one thing to note, most people power it using 12 volts. at 24 volts, on highest volume and both adjuster thingies(the one's you used a screwdriver to set) set to on, the distortion is much less, and it sounds better overall. not sure why this happens, but it seems to be the case, so my future carrying case speaker(built into a suitcase) will be powered using a 12 volt battery pack, with a boost converter to convert it into 24 volts. for best sound quality. just something to note in case people want to use it, sounds best with 24 volts, but works fine down to 8 volts. and above 24 volts will fry it(can take up to 25 volts, but risk of frying is much grater, than using the recommended 24 volts)
It will work better at lower supply voltages if the gain is reduced. These boards have a 2-pos gain switch. Set it at the lowest gain then listen to the music. Try the next gain until the output sounds bad (distortion due to clipping), then drop the gain one level.
Raymond Ramírez true, a 12 volt supply sounds great with both in the off position, but 24 volts is needed to remove distortion from the switches in the on position, not sure about combinations, as i currently dont have a variable supply atm.
why does my set up clip out on the bass tones when I turn it up a bit? Both dip switches are off, 12v from 8 duracell D batts, into Wharfdale Diamonds 8 ohms. Answers appreciated.
can you please test something for me? When you plug in headphones into AUX, it automatically switches to AUX .... but, if you only plug in an extension cable does it switch? i want to install this inside a box, but i won't have access to it inside the box, so i need an extension cable, but i want to be able to use bluetooth still and not be stuck in Aux mode always because i can't unplug the Aux extension cable... can you plug just an extension cable in and see if it switches over?
Hi, any advice for what is the common bluetooth device name appearing on my phone upon search when the device is switched on? Will it be the bluetooth amplifier's model number?
here is a question is there a way to bridge two of these together to make more like a surround sound feel. i already one and it works great. just wondering
When you turn the amp on with the gain up and it turns off quickly, That's your PSU (wall adapter 12v) shutting off into a protective like state. It then restarts. If too much current is being drawn or the PSU is shorted it does that to prevent itself from burning out, Not the amplifier. If you were to use an adapter / transformer with a higher ampage you wouldn't notice the cutting off.
Hi, good tutorial! Any idea about watts with and without switches? I saw it should be 40 watt with 24 volt for speaker, but applying switches? And what about connect an analog potenziometer? It shold be usefull a potenziometer to put it in a box rather than thos delicate buttons.
You'd need to make something else for that. A bluetooth receiver into an RCA knob and then into a dedicated amplifier would do the trick much better. Though, this isn't really suited for a car nonetheless, even if it is specified for it.
does the aux works as a stereo output with level controlled by bluetooth at the same time as there is speaker output? I need to connect another amplifier to it for the subwoofer
Came across this video while looking for info on TDA7492P, so i'll just mention this for anyone who reads this in the future The TDA7492P is only 2*25W (shown as 2*50W on ebay by some sellers which is false) Also the 25W per channel is the PEAK voltage, NOT RMS voltage. So a peak voltage of 25W per channel is giving only 12.5W RMS per channel (max)
Karan Bajwa you think I can pair this amp with 4 speakers?? They are 3watts and I can wire them at 8ohms (I want to use 2 for left and 2 for right) the speakers are from the Logitech ls11
I use 12v 3.5A supply.. I found out that at higher volumes the amplifier suddenly shuts off and starts again in a few seconds. .. what should be the problem
It's overheating. A lot of current going though the amp chip. Try reducing volume or getting a small heat sink. If it doesn't stop when you reduce the volume, it might be an issue with your power supply, or a faulty unit.
by using 12v 3.5a you get 42watts of power (12*3,5). It's best that you use 12v5a for 60watts of power or event 24v3a for 72watts of power. At higher volume you need more watts to power up your speakers, or else the amp will shutdown because the speakers will drain all the power left there for it to work.
Your power supply is insufficient, as mentioned already. Upgrade to something else. Perhaps play around with a PC power supply, as they can usually supply 7-8Amps over +12v. Otherwise, go for a higher voltage supply, as that's needed when the DIP's are on.
So that stereo jack is a output and not a input? Do you know any amplifier that has Bluetooth and auxiliary input? i want to conect my phone using a auxiliary cable but also having the bluetoot support
+Zona ALG it is an input. i have the same amplifier. but i also have a 2.1 bleutooth amplifier. 18 to 24 volts. 100 x 50 x50 watts. its better then this one. but i like this one to
I have a similar board, I absolutely HATE the startup sound and beeps when adjusting volume. I've taken to just keeping it on all the time but it's still absurd how loud the beeps are!
Do you know what kind of buttons those are? Im in the process of making a BT speaker and want to extend the buttons to the outside of the speaker but wasn't sure what kind of button/switches to get.
On another note I purchased a few of the pam8403 with the volume knob to check out the sound. I've read mixed reviews so I checked it out. Okay its not tda7492p, but for the size and with the right speakers it sounds pretty good. I took a usb bluetooth (.99 cents), a pam8403 (.99cents), 2- 4 inch speakers from the trash and used a small power bank for 5vdc power. Soldered it all up and it's more than loud enough for a small room. anyone try these out?
So I ordered one of these but whenever I start it up, it starts at minimum volume. I can increase the volume by pressing the button on the unit manually, but I have this hidden behind my dashboard in my car. Is there any way to set the volume to a default value?
I would really like to power this board up with 24vdc but also make it portable. Without going crazy in price and be able to have it play at least 5 to 6 hours and rechargeable could you recommend a way to do this? I am somewhat mechanically inclined and have a basic understanding of electrcity.
I'm thinking about discreet solar panels on the top of the cabinet/speaker box to charge the batteries. I have 4x 3v batteries from an old laptop charger. and was wondering if I could recharge then with 2x 6v panels. 2 of them would be small enough to go onto the cabinet without it looking like a hash job. I've been charging and disharging the batteries well enough with one panel (need to find another one) Theres no reason why the amp wont work on twelve volts all day long. Even when it's cloudy
I am unable to get the aux to act as a line-in. The bluetooth led's keep blinking even when I plug in and out the audio input. The only moment when I am able to get sounds via aux input (line-in) from the speakers is during the first 2 seconds after turning on the board. Then I hear that loud beeping sound , after which only bluetooth audio can be played. Any tips to get the aux-in working?
i just bought a second (very old) car just for going to job, can i use this as a radio in car? just plug the power and speakers then i can play music from my smartphone trough the car's speakers?
Yes that will work. You won't get radio on that, you can only plug in your phone/pc/mp3-player etc via aux or pair with bluetooth. Connect car speakers to it, and plug power cable in to cigarette lighter, you need adapter or make one yourself. But i would rather spend 2-3x the amount and just buy a cheap headunit with aux.
My bluetooth amp came in the post yesterday. It works great, very pleased with it. The audio is pretty flat, I got zero bass at the start but once I downloaded an equalizer on my phone it soon sorted the problem. I am using a 12v 2amp adaptor with mine and I can set the switches to 1 on 2 off and 2 on 1 off without the start up issue you was having. I haven't tried both set to on yet. My model is slightly different to yours as well. Mine doesn't have an on/off switch on the board or a 3.5mm jack input, you turn it on and off by the plug socket maybe it's a newer model that fixed the start up problem? Great little device and a great video that helped me decide on buying one :) Just need to finish making my case for it to mount to the speaker :D
+Henry S Hi Henry, here is the link to the one I bought. www.amazon.co.uk/gp/aw/d/B018FX57IS/ref=yo_ii_img?ie=UTF8&psc=1 And the project went well, I'm really happy with how it turned out, here's a couple of pics of the finished project. s31.postimg.org/fn13ngjuz/IMG_20160209_165527.jpg s31.postimg.org/8n99ivfrf/IMG_20160217_122819_1.jpg In the end I used a mod called "viper4android" you need to be rooted but it sounds incredible. If you're not rooted just try different equalisers in your app store. The sound quality is extremely good bit without a decent equaliser it does sound pretty flat and unimpressive. Hope this helps.
+Henry S Thanks, took awhile to make in the end though. I originally made a tin case but it didn't turn out as well as I wanted, it was fine but I am a bit of a perfectionist haha. The plastic case worked much better. Just cut it to size, made interlinking tabs and super glued it together. The mesh was from a PC DVD drive blank fascia and the lid was a DVD case, I just used the hinge from the DVD case an glued it on then used Velcro to secure the lid and to attach the case to the speaker. I can't tell you enough how great this little device is and for the price it's a no brainer. If I had another set of speakers I'd get another one without a second thought. All in all cost me about £15 but I had a lot of the bits including a power supply. Good luck with yours if you buy one :)
looks great! how do you operate the power switch of the amp? Im making this to run on batteries. Or does it just work when it gets power? Because then i could just add a easy on/off switch between the power supply and pcb. Greetings from the Netherlands
can anyone please tell me what is the perfect power supply and is there any way out to make a portable speaker ( 2 woofer ,2 speaker ,2 tweeter) using this . thanks in advance.
You could hack it so that the output slowly rises instead of immediately. Something with a big capacitor might absorb the input surge and the sound, and by then the cap will be full and you'll be able to bypass it somewhat. Be sure to use a transistor to bypass the capacitor once it's at full charge.
I've just got mine in the mail today. On the subject of the Aux port (3mm jack)... it also doubles up as a line in (in case anyone was wondering) It amplifies 2 stereo sources simultaniously. The line in and the bluetooth. the dip switches have to be set in off position to power it up. Is it loud? Yes it is. The quality of sound (and volume) will depend on choice of speakers. I cant work out why it can't be paired though. My android device has no trouble playing music through it via bluetooth but ipad won't give it a look in, maybe i'm missing something. That was a disappointment because I bought it to use with my ipad. Apart from that minor niggle It's a nice peice of kit, I'm very pleased with it.
If you begin the video you will see a small black square block of plastic just above and to the left of the bluetooth ICB. That is a 3mm stereo mini jack port. If you feed a signal into it it acts as a line in. On the other hand if you feed the signal out of it to something else (while the amp is recieving a blutooth source) it acts as a line out. useful if you just want to use it as a bluetooth reciever linked up to another amp, say to a hifi system with no bluetooth built in. I use a standard all in one laptop power supply (22v) Speakers are from a 50x50w sony mini hi fi. 8 ohms each and this thing is twice as loud as the sony hifi system that came with the speakers. Some devices sound crystal clear (my laptop sending bluetooth to it) sounds great. My win10 tablet (linx) on the other hand sounds terrible with too much digital transmission noise going on. Ipad works well with it now, as does my iphone. On the power settings - there is no difference in quality of sound switching among them as long as you give it 20v or so you will get a clean punchy sound from the amp and it never sounds distorted if your tracks are high quality. For obvious reasons, the bluetooth background noise can sometimes be a nuisance. but when you use the aux-in the unit sounds amazing. For ten quid it's a no brainer. And for another three quid you can order a DIY perspex case for it. Be careful choosing, some come without the aux port.
+saintlemus You are supposed to be able to plug a 3.5mm plug into the jack while the Bluetooth isn't connected and use it as a line in. but that didn't seem to work for me, so i'm not sure.
+majorjip thanks for the tip. the lack of info on this item makes me wait on the project. I want to add this mini amp to my existing car sound and be able to take it off and use it while camping or tailgating etc.
+saintlemus If you are looking for something that just has a line in, maybe you would be better off with something like the Lepai LP2020A+ Amplifier. They sell for about $25 on Amazon and have a bit more power than this. there is also a lot more info available about that amp. As for info, all i was able to fine is the datasheet for the the amplifier chip itself, which I added a link to in the description.
yet there was one on a you tube video he ran it on aa batteries at 12-15v which i have the same , how could i do this please ? could i use one of the step up adapter things thanks
Jordan Cooper You would need to use 10 AA batteries. Try powering it on with a standard 12v adapter as a test. If it works with the adapter, but not with the batteries, then it's the amps. If both doesn't work, then you may have a faulty amplifier.
just curious, did you figure out the issue? i am having the same problem and i am using a 12v 7Ah lead acid battery and the amp wont turn on, but when i plug a 9v AC plug into it, it turns on and works with out problem..
I understand that most of these style of units have a basic design flaw in that there is a ground loop (with the BT unit) causing the poor sound reproduction. You need to isolate the DC power supply from the BT/Amplifier - maybe a mod too far for such a cheap amplifier.
+Devin Dewanarayana Well, As far as all of the datasheets say, you should be able to. All of the capacitors are rated up to 36 volts, and the amplifier chip itself is rated up to 25 volts, so you should be good at 20 volts. I personally havent run it on any more than 14v.
+Jose Muñoz this is incorrect the system board has a wide range voltage regulator. the lower the voltage the more current the board will draw. but the output power will be the same.
+TheGeeksOf Douzze Im not sure what the actual output power of this thing is, but all the listings on eBay call it 50 watts peak. If you look at the data sheet for the TDA7492P Chip (Which I will put a link in the description to) It says this chip puts out 25 Watts RMS at 10% THD. Whether or not it actually does i am a little skeptical of.
I !, i have mine, at the begining it work well ! but when I connect an 3.5 jack for input music from my phone the cable touch one of the ouput of the speakers, you can say "don't worry it's nothing" but now the music is always ouputing by the jack (in bluetooth mode) the amp Broke ? they are no sound out of the amp to the speakers ! WHY ? my christmas present !! nooooo
You are all wrong, I'm sorry to say but TDA7492P is 2x25W and TDA7492 is 2x50W. The difference is the P in the name. How can you spot them? Well, TDA7492P board is RED and TDA7492 is yellow and it has a heatsink on top of the chip.
Also don't leave your gain switches up when playing at full volume, There's entirely no need to do that and it will cause more distortion yes - the amplifier is trying to kick out more power than is capable of or your feeding more volume into the amplifier than it's capable of. So it peaks out.
built a portable battery driven amp with 7 cell lithium ion pack, it was too much.. it just didnt turned on. after lowering to 6 cells it turned on, even that the datasheet says absolute max is 30, but i was way below 30 :/
Your speaker's wattage doesn't really matter too hugely. If you have 10w speakers, and they run over 4 ohms, just don't turn it up all the way or it'll succeed in the coilcooker.
hey im wanting to build techbuilders boombox project, he uses 2 tweeter speakers and 2 subs and 1 passive radiator (which doesn't use power) and he has 2 frequency boards, and the 25w+25w bluetooth amplifier so i was wondering if any of you could recommend a parts list to the 4 speakers 2 frequency boards and power supply needed to build such a speaker watch the video at techbuilders chanel it has a red face on the speaker
I would like to use this amp with a single speaker...could someone explain the best way to do this, other than hooking the speaker up to either the left or right side?
I'm asking how I can use this amp to power a single speaker, besides plugging it into just the left or right channel...I understand using a mono amp would be best, but this is the amp that I'm working with
You want a mono amp, then use one channel. You cannot use these "bridged" as they are already bridged. The speakers wires (all 4 of them) need to stay separate. You know, coz it's stereo.
TDA7492P and TDA7492 are 25w x 25w and 50w x 50w respectively according to these specs... www.st.com/web/en/resource/technical/document/datasheet/CD00211320.pdfwww.st.com/web/en/resource/technical/document/datasheet/CD00205863.pdf ... I've been testing a TDA7492P. At 1kHz sine wave and 25.5 VDC supply, it will produce 24.8 (close enough to 25) watts RMS into a 6 ohm load (per channel). Altho at 15 kHz, the distortion product rose sharply as seen on the o-scope. Reducing the level to a usable undistorted level yielded 20.8 watts RMS (into a 6 ohm load). This is probably ok, considering that a 4 watt difference is scarcely 1 dB difference and would not be noticed during normal operation. At the 20 watt output level, the amp is virtually flat across the 40 Hz - 15 kHz range. These amps don't go into clipping as do linear-type amp, but just get more distorted with HF oscillations occurring on the sine wave peaks and the amp starts going into intermittent OL shutdown. This is probably more info than you ever wanted or needed to know, but since you had asked, I thought I'd share it. ;-)
Sorry I didn't reply earlier; I missed seeing your comment here. You are correct - P=I*R; also P = E x I, and E2 / R. Catalin Nastasa also made a good point too.
what power supply did you use to power that amp? I want to get one of these things but I am concerned that I won't find a power supply that would fit the power jack.Thanks
+Rzangrilli I believe the size is 5.5mm x 2.1mm. It seems to be a very common barrel plug used on cctv cameras. The power adapter I was using was a 12 volt 2 amp power adapter that was actually made for cctv cameras. if you need a connector, just search eBay for 2.1mm cctv barrel plug and you will find them.
Guys mine was shuting off if I switch to high volume. whats the problem of this. the power supply I used is 12volts 1amp. please guide me to use this module. :)
I bought one of these off eBay, the eBay listing itself suggests that the device name will be displayed as SANWU Audi, are you aware of anyway of changing this?
Can anyone message me private as too how I would configure multiple speakers and tweeters too this and what mods if any need too be made I want too make my own blutooth speaker with two main speakers and maybe 4 tweeters
This device is set up to run 2 speakers in stereo, so you get a couple 2 way crossovers and wire them + and - from the left channel on the board to the + and - on the input of the crossover, then you wire + and - from the bass on the crossover to the woofer and the same for the tweeter and repeat this for the right channel... Important! When you wire 2 8ohm speakers in parallel you get 4ohm, that's + to + and - to - But if you wire 2 8ohm speakers in a series, you run them + to - and you get 16ohm... This is partially why we install a crossover, but not all crossovers allow you to maintain the ohms and so we can sometimes maintain our ohm's and always make a nice clean sound and separates the high and low frequencies, without the crossovers we get a lot of distortion and the ohm's drop... There's a way to do everything! Cabinet one will have everything in it, the board, batteries, one 8ohm woofer and one tweeter wired to the crossover for the second cabinet you have another crossover wired the same as the first cabinet, now you have left and right stereo 4ohm a channel, but if you want 4 cabinets use all 16ohm in parallel and you wind up with 4ohm and wire the first cabinet to the third and the second to the fourth and you can skip installing the crossovers for the third and fourth by either hardwiring the woofer from the first crossover to the woofer on the third and the same for the second and fourth crossover or use the red+ and black- terminals that you usually find on speakers or use a 1/4" stereo jack and drill a hole on the back of each speaker... On the third and fourth speaker will be wired directly to the 1/4 inch jack or hardwired, but make sure you maintain the + and - throughout and make sure you don't cross the wires from the crossovers from the bass and treble between the first and third cabinet or you're going to have problems. Use a multimeter to verify your ohm ratings before you turn it on... If you plan to use 4 speakers in a car both front and back you'll have to use a stereo volume pot on each of the fronts or you wont hear the rear speakers and install the volume pots after you run the wires in and before the wires are connected to the speakers... If you unplug the front speakers you will be running a 8ohm rear and all four will make 4ohm... Important: If you get a crossover that allows you to maintain a 8ohm woofer and a 8ohm tweeter a total of 8ohm's it will not become 4ohm's it will stay 8ohm total so work according to your crossovers. Or you can run four cabinets with just one 8ohm wide range speaker in each cabinet and skip the crossovers and all four will become 4ohm for the left and 4ohm for the right.... If there's a issue write back.
Would reversing the polarity burn up the unit? I powered one of these chips up yesterday with an old computer PSU that I usually use for an old car head unit and the main chip immediately fried. I just hooked it up using the connector from an old wall AC adapter.
That "hardware" power switch is not real. See that 8 pin SMD? Its a mosfet that controls the power. That latching switch feeds power to the gate. Also when the board is connected, you have power running to some components regardless of what switch mode. I fried one like that.
These baby's are unreal... I have two.. Turn volume to medium height on module, add two standard household stereo speakers and boom... She loud as a lizard having baby lizards 😂
Here's the DATA sheet on the chip www.st.com/content/ccc/resource/technical/document/datasheet/35/01/97/6b/20/ce/40/6f/CD00211320.pdf/files/CD00211320.pdf/jcr:content/translations/en.CD00211320.pdf
I would advise against buying the amp from this supplier: The item arrived with a broken case and the buttons supplied did not work with the case. Resoldering the correct buttons working with the case is only for skilled professionals, not a DIY job. The amp makes "farting" noises once the volume goes above 1/2 way while the other TDA7492P amp I have purchased previously performs excellently, so the one from this supplier was a big disappointment.
Great video, gave a thumbs up!! I do need a bit of advice though. I plan to buy this but I'm not sure what power adaptor to get. I don't want a laptop adaptor to be honest and other adaptors don't go too high in power. What adaptor did you use, ie volts and amps? Did the adaptor get hot while in use? Will a 12v 2amp adaptor be ok? Specifically this one: www.amazon.co.uk/New-100-240V-Power-Supply-Adapter/dp/B00AY9RY3S Thanks a lot for any advice I am a noob at this sort of stuff :) EDIT: My speakers are 6 ohms btw.
+Jason Hickling That should be fine, i was using a 12 Volt 2 Amp power supply in my video and it had more than enough power to drive some decent size speakers. You could technically use a bigger power supply to get more power, but i think that would be unnecessary unless you really want to push this thing to its limits.
+majorjip Thanks a lot, I'll use the same power supply then. Just in case you didn't know or anyone else hasn't seen this the switches you moved can be alternated for different levels of DB. For instance 1 set to on and 2 set to off. This may explain it better although this model doesn't have a 3.5 jack like yours does. www.qiannipicture.com/pic/UploadFile/P0/SKU280014/E38237379A9E8D9667A1568D23CFCFC6D6362AC6CA26CE03CB53D254CB66CD46D2139E9B5ECAD2CB660346D2C89916CB9C1673CEC646419A33CDA0C9.jpg
Jason King not sure but it seems like my 10,000 mah 12v battery never dies lol. I haven't used my speaker in over a year(just pulled it out of the basement and listened to music on it for a half an hour already. I believe I've used for at least 12 hours before I put it up. I have an eBay battery on it with cheap soldered connections and one broke and can't find a wiring diagram to fix it so I can charge it back up(reason why I put it up to begin with ha)
hey im wanting to build techbuilders boombox project, he uses 2 tweeter speakers and 2 subs and 1 passive radiator (which doesn't use power) and he has 2 frequency boards, and the 25w+25w bluetooth amplifier so i was wondering if any of you could recommend a parts list to the 4 speakers 2 frequency boards and power supply needed to build such a speaker watch the video at techbuilders chanel it has a red face on the speaker
one thing to note, most people power it using 12 volts. at 24 volts, on highest volume and both adjuster thingies(the one's you used a screwdriver to set) set to on, the distortion is much less, and it sounds better overall. not sure why this happens, but it seems to be the case, so my future carrying case speaker(built into a suitcase) will be powered using a 12 volt battery pack, with a boost converter to convert it into 24 volts. for best sound quality.
just something to note in case people want to use it, sounds best with 24 volts, but works fine down to 8 volts. and above 24 volts will fry it(can take up to 25 volts, but risk of frying is much grater, than using the recommended 24 volts)
It will work better at lower supply voltages if the gain is reduced. These boards have a 2-pos gain switch. Set it at the lowest gain then listen to the music. Try the next gain until the output sounds bad (distortion due to clipping), then drop the gain one level.
Raymond Ramírez true, a 12 volt supply sounds great with both in the off position, but 24 volts is needed to remove distortion from the switches in the on position, not sure about combinations, as i currently dont have a variable supply atm.
Maybe capacitors?
What do you mean?
24v will make it run better because it's easier for the amplifier to reach its peak performance due to higher power input (in most cases.)
why does my set up clip out on the bass tones when I turn it up a bit? Both dip switches are off, 12v from 8 duracell D batts, into Wharfdale Diamonds 8 ohms. Answers appreciated.
can you please test something for me? When you plug in headphones into AUX, it automatically switches to AUX .... but, if you only plug in an extension cable does it switch? i want to install this inside a box, but i won't have access to it inside the box, so i need an extension cable, but i want to be able to use bluetooth still and not be stuck in Aux mode always because i can't unplug the Aux extension cable... can you plug just an extension cable in and see if it switches over?
Hi, any advice for what is the common bluetooth device name appearing on my phone upon search when the device is switched on? Will it be the bluetooth amplifier's model number?
here is a question is there a way to bridge two of these together to make more like a surround sound feel. i already one and it works great. just wondering
Can i ask where is the positive and negative in the interface 2.1? I am using only battery and i dont know where to connect it.
When you turn the amp on with the gain up and it turns off quickly, That's your PSU (wall adapter 12v) shutting off into a protective like state. It then restarts. If too much current is being drawn or the PSU is shorted it does that to prevent itself from burning out, Not the amplifier. If you were to use an adapter / transformer with a higher ampage you wouldn't notice the cutting off.
Hi, good tutorial! Any idea about watts with and without switches? I saw it should be 40 watt with 24 volt for speaker, but applying switches? And what about connect an analog potenziometer? It shold be usefull a potenziometer to put it in a box rather than thos delicate buttons.
i would like to know the specification of D5 on the board
or a clear photo of D5 which is on the board
I have so many questions..could i use it in a car with car speakers?How do i adapt a knob control for volume,an aux cable port?
You'd need to make something else for that. A bluetooth receiver into an RCA knob and then into a dedicated amplifier would do the trick much better. Though, this isn't really suited for a car nonetheless, even if it is specified for it.
does the aux works as a stereo output with level controlled by bluetooth at the same time as there is speaker output?
I need to connect another amplifier to it for the subwoofer
Yes.
Came across this video while looking for info on TDA7492P, so i'll just mention this for anyone who reads this in the future
The TDA7492P is only 2*25W (shown as 2*50W on ebay by some sellers which is false)
Also the 25W per channel is the PEAK voltage, NOT RMS voltage.
So a peak voltage of 25W per channel is giving only 12.5W RMS per channel (max)
Karan Bajwa you think I can pair this amp with 4 speakers?? They are 3watts and I can wire them at 8ohms (I want to use 2 for left and 2 for right) the speakers are from the Logitech ls11
Hello. my question is . what is + and - in the plug? (+ is pin center, and - ground is around) thanks.
+Juan Hernandez yes, + is in the center, and - is around. (Had to test it as well)
I use 12v 3.5A supply.. I found out that at higher volumes the amplifier suddenly shuts off and starts again in a few seconds. .. what should be the problem
It's overheating. A lot of current going though the amp chip. Try reducing volume or getting a small heat sink. If it doesn't stop when you reduce the volume, it might be an issue with your power supply, or a faulty unit.
was wondering if i was the only one having this issue.... using a 19v supply, will test volume to see if that fixes the problem.
It works at low volumes. Must be overheating as you suggested... Bought some heatsinks off eBay... Hope that helps
by using 12v 3.5a you get 42watts of power (12*3,5). It's best that you use 12v5a for 60watts of power or event 24v3a for 72watts of power. At higher volume you need more watts to power up your speakers, or else the amp will shutdown because the speakers will drain all the power left there for it to work.
Your power supply is insufficient, as mentioned already. Upgrade to something else. Perhaps play around with a PC power supply, as they can usually supply 7-8Amps over +12v. Otherwise, go for a higher voltage supply, as that's needed when the DIP's are on.
Does have a feedback noise?
So that stereo jack is a output and not a input?
Do you know any amplifier that has Bluetooth and auxiliary input?
i want to conect my phone using a auxiliary cable but also having the bluetoot support
+Zona ALG it is an input. i have the same amplifier. but i also have a 2.1 bleutooth amplifier. 18 to 24 volts. 100 x 50 x50 watts. its better then this one. but i like this one to
+ben grobben what's the name/ model number for that 2.1 you have? I haven't had any luck finding a 2.1 that doesn't sound like crap.
Thanks for the info! I'm only wondering if it can handle phone calls... You know, for my dad that doesn't hear very good.
I have a similar board, I absolutely HATE the startup sound and beeps when adjusting volume. I've taken to just keeping it on all the time but it's still absurd how loud the beeps are!
InsertFlashyName mine pops like 4 times when i start it up loud as hell, don't know why but really hate that noise
Oh God
I hate that Beeb sound.
@SMOG : Great ! Perhaps you should consider doing a video on the subject, I'm sure a lot of people would appreciate.
Is there a way to disable the beeps it makes when it starts and changes volume?
no
Zander Mine doesn't even have that issue. Runnig at 12 v atm.
Do you know what kind of buttons those are? Im in the process of making a BT speaker and want to extend the buttons to the outside of the speaker but wasn't sure what kind of button/switches to get.
Brian Festa those are called tactile switches
In this case, they're Momentary switches. They have 4 pins but using 2 will be fine in most cases (unless they're all hooked up to a trace.)
On another note I purchased a few of the pam8403 with the volume knob to check out the sound. I've read mixed reviews so I checked it out. Okay its not tda7492p, but for the size and with the right speakers it sounds pretty good.
I took a usb bluetooth (.99 cents), a pam8403 (.99cents), 2- 4 inch speakers from the trash and used a small power bank for 5vdc power. Soldered it all up and it's more than loud enough for a small room.
anyone try these out?
So I ordered one of these but whenever I start it up, it starts at minimum volume. I can increase the volume by pressing the button on the unit manually, but I have this hidden behind my dashboard in my car. Is there any way to set the volume to a default value?
I would really like to power this board up with 24vdc but also make it portable. Without going crazy in price and be able to have it play at least 5 to 6 hours and rechargeable could you recommend a way to do this? I am somewhat mechanically inclined and have a basic understanding of electrcity.
I'm thinking about discreet solar panels on the top of the cabinet/speaker box to charge the batteries. I have 4x 3v batteries from an old laptop charger. and was wondering if I could recharge then with 2x 6v panels. 2 of them would be small enough to go onto the cabinet without it looking like a hash job. I've been charging and disharging the batteries well enough with one panel (need to find another one) Theres no reason why the amp wont work on twelve volts all day long. Even when it's cloudy
Can this be wired into a car? How would i connect power? what would i need?
If I m using 12 volt power supply adapter so how much amphere should I use
5A so you get 60watts of power
Hey can you tell me abt that power jack dimensions need to buy jack for that i didn't receive amp yet
Can is use this for 2x 75 watt (4-8 ohm) speakers or do you have a beter option? It is for in my living room.
This amplifier will be fine
How to switch AUX between line in and line out?
just use a line out and it will automtically switch to aux in or vice versa
I am unable to get the aux to act as a line-in. The bluetooth led's keep blinking even when I plug in and out the audio input.
The only moment when I am able to get sounds via aux input (line-in) from the speakers is during the first 2 seconds after turning on the board.
Then I hear that loud beeping sound , after which only bluetooth audio can be played.
Any tips to get the aux-in working?
The AUX port is made for headphones or something similar.
i just bought a second (very old) car just for going to job, can i use this as a radio in car? just plug the power and speakers then i can play music from my smartphone trough the car's speakers?
Yes that will work. You won't get radio on that, you can only plug in your phone/pc/mp3-player etc via aux or pair with bluetooth. Connect car speakers to it, and plug power cable in to cigarette lighter, you need adapter or make one yourself. But i would rather spend 2-3x the amount and just buy a cheap headunit with aux.
Hi,
Does anyone know what the current rating should be if I go with a 24VDC supply?
Thanks
If you won't be playing at full volume, 2-4Amps will do. Try using a formula next time haha. Voltage * Amperage = Wattage. :)
My bluetooth amp came in the post yesterday. It works great, very pleased with it. The audio is pretty flat, I got zero bass at the start but once I downloaded an equalizer on my phone it soon sorted the problem. I am using a 12v 2amp adaptor with mine and I can set the switches to 1 on 2 off and 2 on 1 off without the start up issue you was having. I haven't tried both set to on yet.
My model is slightly different to yours as well. Mine doesn't have an on/off switch on the board or a 3.5mm jack input, you turn it on and off by the plug socket maybe it's a newer model that fixed the start up problem? Great little device and a great video that helped me decide on buying one :)
Just need to finish making my case for it to mount to the speaker :D
Hey Jason, do you have a link to the one you have please? Also how's your project going? I'm taking on one this summer
+Henry S Hi Henry, here is the link to the one I bought.
www.amazon.co.uk/gp/aw/d/B018FX57IS/ref=yo_ii_img?ie=UTF8&psc=1
And the project went well, I'm really happy with how it turned out, here's a couple of pics of the finished project.
s31.postimg.org/fn13ngjuz/IMG_20160209_165527.jpg
s31.postimg.org/8n99ivfrf/IMG_20160217_122819_1.jpg
In the end I used a mod called "viper4android" you need to be rooted but it sounds incredible. If you're not rooted just try different equalisers in your app store.
The sound quality is extremely good bit without a decent equaliser it does sound pretty flat and unimpressive. Hope this helps.
Jason Hickling Thank you for the links and comment :) I like your work, looks quite tidy.
+Henry S Thanks, took awhile to make in the end though. I originally made a tin case but it didn't turn out as well as I wanted, it was fine but I am a bit of a perfectionist haha. The plastic case worked much better. Just cut it to size, made interlinking tabs and super glued it together. The mesh was from a PC DVD drive blank fascia and the lid was a DVD case, I just used the hinge from the DVD case an glued it on then used Velcro to secure the lid and to attach the case to the speaker.
I can't tell you enough how great this little device is and for the price it's a no brainer. If I had another set of speakers I'd get another one without a second thought. All in all cost me about £15 but I had a lot of the bits including a power supply.
Good luck with yours if you buy one :)
looks great! how do you operate the power switch of the amp? Im making this to run on batteries. Or does it just work when it gets power? Because then i could just add a easy on/off switch between the power supply and pcb. Greetings from the Netherlands
can anyone please tell me what is the perfect power supply and is there any way out to make a portable speaker ( 2 woofer ,2 speaker ,2 tweeter) using this .
thanks in advance.
Whats the amperage consumption at 24 volts max volume?
Good quality sound? Are the distortions? thanks
is there anyway to disable that power on sound yet??
You could hack it so that the output slowly rises instead of immediately. Something with a big capacitor might absorb the input surge and the sound, and by then the cap will be full and you'll be able to bypass it somewhat. Be sure to use a transistor to bypass the capacitor once it's at full charge.
I've just got mine in the mail today. On the subject of the Aux port (3mm jack)... it also doubles up as a line in (in case anyone was wondering) It amplifies 2 stereo sources simultaniously. The line in and the bluetooth. the dip switches have to be set in off position to power it up. Is it loud? Yes it is. The quality of sound (and volume) will depend on choice of speakers. I cant work out why it can't be paired though. My android device has no trouble playing music through it via bluetooth but ipad won't give it a look in, maybe i'm missing something. That was a disappointment because I bought it to use with my ipad. Apart from that minor niggle It's a nice peice of kit, I'm very pleased with it.
Becaue apple is compatible with nothing lol..
Found a way around it. iPad into iodock and iodock into aux in... even better. The aux in is way louder and puncier than the bluetooth reciever
Practical and compact I`m sure..
Where is the AUX Line-In on this board? How do I attach the port?
If you begin the video you will see a small black square block of plastic just above and to the left of the bluetooth ICB. That is a 3mm stereo mini jack port. If you feed a signal into it it acts as a line in. On the other hand if you feed the signal out of it to something else (while the amp is recieving a blutooth source) it acts as a line out. useful if you just want to use it as a bluetooth reciever linked up to another amp, say to a hifi system with no bluetooth built in.
I use a standard all in one laptop power supply (22v) Speakers are from a 50x50w sony mini hi fi. 8 ohms each and this thing is twice as loud as the sony hifi system that came with the speakers.
Some devices sound crystal clear (my laptop sending bluetooth to it) sounds great. My win10 tablet (linx) on the other hand sounds terrible with too much digital transmission noise going on. Ipad works well with it now, as does my iphone.
On the power settings - there is no difference in quality of sound switching among them as long as you give it 20v or so you will get a clean punchy sound from the amp and it never sounds distorted if your tracks are high quality.
For obvious reasons, the bluetooth background noise can sometimes be a nuisance. but when you use the aux-in the unit sounds amazing.
For ten quid it's a no brainer. And for another three quid you can order a DIY perspex case for it. Be careful choosing, some come without the aux port.
does it have a line in for audio besides Bluetooth?
+saintlemus You are supposed to be able to plug a 3.5mm plug into the jack while the Bluetooth isn't connected and use it as a line in. but that didn't seem to work for me, so i'm not sure.
+majorjip thanks for the tip. the lack of info on this item makes me wait on the project. I want to add this mini amp to my existing car sound and be able to take it off and use it while camping or tailgating etc.
+saintlemus If you are looking for something that just has a line in, maybe you would be better off with something like the Lepai LP2020A+ Amplifier. They sell for about $25 on Amazon and have a bit more power than this. there is also a lot more info available about that amp. As for info, all i was able to fine is the datasheet for the the amplifier chip itself, which I added a link to in the description.
wy do i keep getting a nlie and red flashing light i can pair it to any devices help !!!
any ideas why mine wont run off 12v on batteries ?
+Jordan Cooper Not enough amps? The one in the video is running at 12V 1.5A
yet there was one on a you tube video he ran it on aa batteries at 12-15v which i have the same , how could i do this please ? could i use one of the step up adapter things
thanks
Jordan Cooper You would need to use 10 AA batteries. Try powering it on with a standard 12v adapter as a test. If it works with the adapter, but not with the batteries, then it's the amps. If both doesn't work, then you may have a faulty amplifier.
just curious, did you figure out the issue? i am having the same problem and i am using a 12v 7Ah lead acid battery and the amp wont turn on, but when i plug a 9v AC plug into it, it turns on and works with out problem..
i honestly dont know either as im trying to make a bluetooth speaker out of it but it wont turn on :/
I understand that most of these style of units have a basic design flaw
in that there is a ground loop (with the BT unit) causing the poor sound
reproduction. You need to isolate the DC power supply from the
BT/Amplifier - maybe a mod too far for such a cheap amplifier.
Simon Jowett how?
I actually installed that same amp into those same speakers! Wish I could send a pic!
The description says volatge from 8~25V. Is it okay if i use 20V instead of 12V?
+Devin Dewanarayana Well, As far as all of the datasheets say, you should be able to. All of the capacitors are rated up to 36 volts, and the amplifier chip itself is rated up to 25 volts, so you should be good at 20 volts. I personally havent run it on any more than 14v.
+majorjip Thank you very much. I got it now. Cheers! :)
+Devin Dewanarayana The more voltage you put in the circuit, the more power you got on your speakers. 20V is perfect.
Thank you bro :)
+Jose Muñoz this is incorrect the system board has a wide range voltage regulator. the lower the voltage the more current the board will draw. but the output power will be the same.
It's an 50w really ? I see it whriten on ebay 2X25W or 2X50W ?
+TheGeeksOf Douzze Im not sure what the actual output power of this thing is, but all the listings on eBay call it 50 watts peak. If you look at the data sheet for the TDA7492P Chip (Which I will put a link in the description to) It says this chip puts out 25 Watts RMS at 10% THD. Whether or not it actually does i am a little skeptical of.
OK, thanks, I've purchased it so a whant to know if it 50w, but it's an amazing gadget !
+TheGeeksOf Douzze It sure is, especially for the low price they are sold at.
I !, i have mine, at the begining it work well ! but when I connect an 3.5 jack for input music from my phone the cable touch one of the ouput of the speakers, you can say "don't worry it's nothing" but now the music is always ouputing by the jack (in bluetooth mode) the amp Broke ? they are no sound out of the amp to the speakers ! WHY ? my christmas present !! nooooo
You are all wrong, I'm sorry to say but TDA7492P is 2x25W and TDA7492 is 2x50W.
The difference is the P in the name.
How can you spot them? Well, TDA7492P board is RED and TDA7492 is yellow and it has a heatsink on top of the chip.
Also don't leave your gain switches up when playing at full volume, There's entirely no need to do that and it will cause more distortion yes - the amplifier is trying to kick out more power than is capable of or your feeding more volume into the amplifier than it's capable of. So it peaks out.
can we connect it to pc via bluetooth dongle and play music
can u try it
if it gets successful then can u make video on it
Can this amp bridged to get single channel?
It should be, but I won't recommend it. It'll probably explode with some purple magic smoke after a couple minutes :P
Hi just got mine in the mail. But can't get it to power up. Can anyone help?
built a portable battery driven amp with 7 cell lithium ion pack, it was too much.. it just didnt turned on. after lowering to 6 cells it turned on, even that the datasheet says absolute max is 30, but i was way below 30 :/
I need some speakers 50w ? What if I use a 40w ? Thanks
I'm using a pair 10 watt speakers @ 4ohms from a panasonic mini hi fi and they sound amazing. at about 50% it's way loud enough for in any room.
Your speaker's wattage doesn't really matter too hugely. If you have 10w speakers, and they run over 4 ohms, just don't turn it up all the way or it'll succeed in the coilcooker.
hey im wanting to build techbuilders boombox project, he uses 2 tweeter speakers and 2 subs and 1 passive radiator (which doesn't use power) and he has 2 frequency boards, and the 25w+25w bluetooth amplifier so i was wondering if any of you could recommend a parts list to the 4 speakers 2 frequency boards and power supply needed to build such a speaker watch the video at techbuilders chanel it has a red face on the speaker
I would like to use this amp with a single speaker...could someone explain the best way to do this, other than hooking the speaker up to either the left or right side?
YourGoToGuyUnited. Get a mono amp. Just using one output of a stereo amp can hurt it. And doing the outputs in parallell is also not good for the amp.
I'm asking how I can use this amp to power a single speaker, besides plugging it into just the left or right channel...I understand using a mono amp would be best, but this is the amp that I'm working with
Okej i mean u could try using the outputs in parallell to eachother but it could break it.
You want a mono amp, then use one channel. You cannot use these "bridged" as they are already bridged. The speakers wires (all 4 of them) need to stay separate. You know, coz it's stereo.
Great video..i need to know how to wire 3 speakers with this devise
What is the max amps can it handle
A device does not 'handle' amps as a power supply rated for 2Amps will not 'push 2 Amps through the circuit'.
Francisco Sanchez can you please explain.. I do not understand your answer.. could you use a 8amp power supply let's say..
can I use the 19v adapter? is there any side effects?
The amplifier specifies 8/9-28v.
TDA7492P and TDA7492 are 25w x 25w and 50w x 50w respectively according to these specs... www.st.com/web/en/resource/technical/document/datasheet/CD00211320.pdfwww.st.com/web/en/resource/technical/document/datasheet/CD00205863.pdf ... I've been testing a TDA7492P. At 1kHz sine wave and 25.5 VDC supply, it will produce 24.8 (close enough to 25) watts RMS into a 6 ohm load (per channel). Altho at 15 kHz, the distortion product rose sharply as seen on the o-scope. Reducing the level to a usable undistorted level yielded 20.8 watts RMS (into a 6 ohm load). This is probably ok, considering that a 4 watt difference is scarcely 1 dB difference and would not be noticed during normal operation. At the 20 watt output level, the amp is virtually flat across the 40 Hz - 15 kHz range. These amps don't go into clipping as do linear-type amp, but just get more distorted with HF oscillations occurring on the sine wave peaks and the amp starts going into intermittent OL shutdown. This is probably more info than you ever wanted or needed to know, but since you had asked, I thought I'd share it. ;-)
Right, Good point.
Sorry I didn't reply earlier; I missed seeing your comment here. You are correct - P=I*R; also P = E x I, and E2 / R. Catalin Nastasa also made a good point too.
What power supply are you using? Regular 2.5 mm jack 12 volt 2 amp?
so does any one know the amount of bass it pushes
It pushes some pretty hard bass on my two 6.5in bookshelf speakers. It works quite well under Bluetooth.
Bass isn't a secret measure haha. I'm pretty sure this board just /amplifies/ the sound you put into it, and doesn't equalize it.
HumbleDeer True, yes, Bass is subjective to the device's equalizer, but when you do want to push some bass...It does just that.
It's too bad most of the modern music is right at, and mostly even over the 0dB digital limit. No headroom for a decent equalization *shrug*.
the bass is like clear as it was from a yamaha amp and its very very powerful man
How can I hook a subwoofer up on that thing ?
ibrahim hacioglu plug it in. Lol. That's it
No it's not that easy I need to amplify it somehow
Yes it is. What are you having trouble with specifically?
Thanx man it explained a lot to me, buying one today.
what power supply did you use to power that amp?
I want to get one of these things but I am concerned that I won't find a power supply that would fit the power jack.Thanks
+Rzangrilli I believe the size is 5.5mm x 2.1mm. It seems to be a very common barrel plug used on cctv cameras. The power adapter I was using was a 12 volt 2 amp power adapter that was actually made for cctv cameras. if you need a connector, just search eBay for 2.1mm cctv barrel plug and you will find them.
+majorjip And how many volts and amps should i look for?
Pier Wouda
12 volts and around 3 or 4 amps
is it on low?
Has anyone tried bridging the amp yet? I don't wanna fry up the board. And If i can do I need to play my music in mono?
Guys mine was shuting off if I switch to high volume. whats the problem of this. the power supply I used is 12volts 1amp. please guide me to use this module. :)
Shockwave Photobooth you wanna go for 24v at 3 amps and around 6 ohms speakers, runs flawlessly
I bought one of these off eBay, the eBay listing itself suggests that the device name will be displayed as SANWU Audi, are you aware of anyway of changing this?
If you use JTAG to change the Bluetooth module's CMOS, you can.
Mine makes a horrible popping loud sound when i turn it on, not sure why but i hate it.
Same, Wish i knew why :(
Can anyone message me private as too how I would configure multiple speakers and tweeters too this and what mods if any need too be made I want too make my own blutooth speaker with two main speakers and maybe 4 tweeters
This device is set up to run 2 speakers in stereo, so you get a couple 2 way crossovers and wire them + and - from the left channel on the board to the + and - on the input of the crossover, then you wire + and - from the bass on the crossover to the woofer and the same for the tweeter and repeat this for the right channel... Important! When you wire 2 8ohm speakers in parallel you get 4ohm, that's + to + and - to - But if you wire 2 8ohm speakers in a series, you run them + to - and you get 16ohm... This is partially why we install a crossover, but not all crossovers allow you to maintain the ohms and so we can sometimes maintain our ohm's and always make a nice clean sound and separates the high and low frequencies, without the crossovers we get a lot of distortion and the ohm's drop... There's a way to do everything! Cabinet one will have everything in it, the board, batteries, one 8ohm woofer and one tweeter wired to the crossover for the second cabinet you have another crossover wired the same as the first cabinet, now you have left and right stereo 4ohm a channel, but if you want 4 cabinets use all 16ohm in parallel and you wind up with 4ohm and wire the first cabinet to the third and the second to the fourth and you can skip installing the crossovers for the third and fourth by either hardwiring the woofer from the first crossover to the woofer on the third and the same for the second and fourth crossover or use the red+ and black- terminals that you usually find on speakers or use a 1/4" stereo jack and drill a hole on the back of each speaker... On the third and fourth speaker will be wired directly to the 1/4 inch jack or hardwired, but make sure you maintain the + and - throughout and make sure you don't cross the wires from the crossovers from the bass and treble between the first and third cabinet or you're going to have problems. Use a multimeter to verify your ohm ratings before you turn it on... If you plan to use 4 speakers in a car both front and back you'll have to use a stereo volume pot on each of the fronts or you wont hear the rear speakers and install the volume pots after you run the wires in and before the wires are connected to the speakers... If you unplug the front speakers you will be running a 8ohm rear and all four will make 4ohm... Important: If you get a crossover that allows you to maintain a 8ohm woofer and a 8ohm tweeter a total of 8ohm's it will not become 4ohm's it will stay 8ohm total so work according to your crossovers. Or you can run four cabinets with just one 8ohm wide range speaker in each cabinet and skip the crossovers and all four will become 4ohm for the left and 4ohm for the right.... If there's a issue write back.
This may be a dumb newb question but: is the power input center-positive or negative?
it's center-positive
Great, thanks!
It's actually not a dumb question. Often you don't find out 'till you get the device, and it might not even be specified.
Would reversing the polarity burn up the unit? I powered one of these chips up yesterday with an old computer PSU that I usually use for an old car head unit and the main chip immediately fried. I just hooked it up using the connector from an old wall AC adapter.
Jesse Tate It could, possibly. Unlikely, but it certainly is possible. That's why I always use a diode in my circuits, even power supplies!
25watts at 10% thd is a bit hi,so att o.1 thd it would be arround 8 watts RMS 25volt
those switch are gain
When you play audio through Bluetooth you can tell your audiophile friends that your system has an "outboard DAC" :)
ahahahah!!!!!! great....
That "hardware" power switch is not real. See that 8 pin SMD? Its a mosfet that controls the power. That latching switch feeds power to the gate. Also when the board is connected, you have power running to some components regardless of what switch mode. I fried one like that.
Dude no one wants to hear, "I don't know"
Amp chips specifically designed for LCD TVs
which usually have appalling speakers in them
These baby's are unreal... I have two.. Turn volume to medium height on module, add two standard household stereo speakers and boom... She loud as a lizard having baby lizards 😂
Here's the DATA sheet on the chip
www.st.com/content/ccc/resource/technical/document/datasheet/35/01/97/6b/20/ce/40/6f/CD00211320.pdf/files/CD00211320.pdf/jcr:content/translations/en.CD00211320.pdf
nasty pops on power on and off. You might want to get a unit with speaker protection relays (soft start) next time.
I have read the ST documentation posted above by Bob H. There are delay and mute circuits that can be added to the amplifier.
Line in and line out = AUX
I would advise against buying the amp from this supplier: The item arrived with a broken case and the buttons supplied did not work with the case. Resoldering the correct buttons working with the case is only for skilled professionals, not a DIY job. The amp makes "farting" noises once the volume goes above 1/2 way while the other TDA7492P amp I have purchased previously performs excellently, so the one from this supplier was a big disappointment.
www.ebay.com/itm/TDA7492P-2-50W-Bluetooth-4-0-Audio-Receiver-Amplifier-Module-Board-Case-Red-/272484006773?ssPageName=ADME:X:RRNTB:US:3160
Great video, gave a thumbs up!! I do need a bit of advice though. I plan to buy this but I'm not sure what power adaptor to get. I don't want a laptop adaptor to be honest and other adaptors don't go too high in power. What adaptor did you use, ie volts and amps? Did the adaptor get hot while in use? Will a 12v 2amp adaptor be ok? Specifically this one:
www.amazon.co.uk/New-100-240V-Power-Supply-Adapter/dp/B00AY9RY3S
Thanks a lot for any advice I am a noob at this sort of stuff :)
EDIT: My speakers are 6 ohms btw.
+Jason Hickling That should be fine, i was using a 12 Volt 2 Amp power supply in my video and it had more than enough power to drive some decent size speakers. You could technically use a bigger power supply to get more power, but i think that would be unnecessary unless you really want to push this thing to its limits.
+majorjip Thanks a lot, I'll use the same power supply then. Just in case you didn't know or anyone else hasn't seen this the switches you moved can be alternated for different levels of DB. For instance 1 set to on and 2 set to off. This may explain it better although this model doesn't have a 3.5 jack like yours does.
www.qiannipicture.com/pic/UploadFile/P0/SKU280014/E38237379A9E8D9667A1568D23CFCFC6D6362AC6CA26CE03CB53D254CB66CD46D2139E9B5ECAD2CB660346D2C89916CB9C1673CEC646419A33CDA0C9.jpg
24v 3amp
Runs best at 24v 3amp @ 6ohm
You're not very technical are you?
Next time learn your product before doing the video. Daaaaa
how long would a 12v 6000mha battery last powering this?
Jason King not sure but it seems like my 10,000 mah 12v battery never dies lol. I haven't used my speaker in over a year(just pulled it out of the basement and listened to music on it for a half an hour already. I believe I've used for at least 12 hours before I put it up. I have an eBay battery on it with cheap soldered connections and one broke and can't find a wiring diagram to fix it so I can charge it back up(reason why I put it up to begin with ha)
hey im wanting to build techbuilders boombox project, he uses 2 tweeter speakers and 2 subs and 1 passive radiator (which doesn't use power) and he has 2 frequency boards, and the 25w+25w bluetooth amplifier so i was wondering if any of you could recommend a parts list to the 4 speakers 2 frequency boards and power supply needed to build such a speaker watch the video at techbuilders chanel it has a red face on the speaker
passive crossovers are the 2 frequency boards
What is powering the speakers?
The AMPLIFIER is powering the speakers. Amazing, eh!