Trying out a PAM8403 audio amplifier module
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- Опубликовано: 3 май 2015
- I try out a cheap amplifier module featuring a PAM8403 chip by hooking it up to some speakers and playing some tunes. This device is a 3W+3W dual channel (stereo) class-D audio amp in a SOIC-16 package.
The amplifer module I purchased:
www.aliexpress.com/item/New-Mi...
The speakers in the video are from Jaycar, catalogue number AS3034:
www.jaycar.com.au/Sight-%26-So...
The Datasheet is available here:
www.diodes.com/datasheets/PAM8...
This video features free music from the RUclips Audio Library:
ruclips.net/user/audiolibrary...
"Sydney's Skyline" by ALBIS
"9th Symphony, Finale" by Beethoven 
Наука
Thanks for the video demo of the chip, Luc.
With a properly designed pre-amp, these blow the LM386 out of the water as a sweet little guitar amp. Keep the speaker leads short, so that you don't have interference issues. Use a genuine guitar speaker. I like using the new single-supply rail-to-rail op-amps for the pre-amp.
U beauty, was just looking for an lm386 module from Ali, stumbled on your video, loved it, and just purchased a PAM8403 with volume control, 59c + free shipping. I think i'll name my child Ali.
Chris Trigg just got the same one for 52cents
I just got one of these and I very happy with it.
What an amazing little unit. I can't believe they are $1.10! Thanks for the video. :)
thanks for your review.
Thanks for this video. Every bit of it. Cheers.
nice video! Thanks for the review.
People who are dealing with any audio amplifier that doesn't have an internal power supply to boost the voltage need to learn and remember the following: Your output peak voltage can never be more than your input voltage for a full bridge or half the input voltage for a half bridge.
To go from peak voltage to RMS of sine wave AC you multiply by .707
So in theory the output can't be more than .707x the input, in reality it will be even less due to drop within the amplifier itself. In this case the power FETs in the chip have .32 ohms resistance. This adds to the load impedance.
5v X .707 = 3.5v
Power into a load is voltage squared divided by impedance. 3.5 X 3.5 is 12.25.
12.25 divided by 4.32 ohms is 2.84 watts, pretty close to the datasheet 1% value.
12.25 divided by 8.32 ohms is 1.47 watts which again matches.
This is why pretty much every car head unit ever made with a full bridge floating ground speaker output is advertised as 20-25 watts RMS per channel.
14.4 X .707 = 10.18v, squared is 103.63, divided by 4 is 25.9 watts.
Also the PAM8610 version.
12 X .707 = 8.484v, squared is 71.98, divided by 4.4 (4 ohms speaker .4 ohms FETs) is 16.36 watts.
Thanks! Got mine working!
I use PAM8403 AMPs to power my Celestion DL6's and PSB Alpha Mini Monitor Speakers, both 8 ohm.
I added Bluetooth modules, Good sound plenty of volume and surprisingly Bass.
I have also run the 8403s on 16 ohms with no problems I have not been able to heat the amp up at all.
The one on the DL6s runs 24/7 but at low volume in the bed room.
I like these amps you can get a quad channel board using 2 8403s and Bluetooth modules with them built in.
Many of the boards with them are smaller than the one in the video.
These are really some cheap & impressive class D amp modules.
Sadly, mine has no volume control(Pot/VR).
Been using a LM386 and going to try one of these... hoping for some improvement on the sound quality I've been getting out of an Arduino Due DAC.
Nice chip.
THANK YOU!! GREAT JOB!! Mate...Cheers!!!
Actually
The Speakers are
Outstanding !
I got mine and i can say that it delivers LOTS of bass that it scares...but the downside is that after some time it starts to distort.
@sputech99 the -ve speaker terminals connect to separate pins on the PAM8403. I assume its driving the outputs in bridge mode to increase the voltage swing across the speakers. So not really suitable for headphones sharing a common ground wire.
However the following stack exchange answer gives a possible approach to connecting headphones using capacitative coupling, but I have not tried it myself:
electronics.stackexchange.com/questions/149687/cost-effective-solution-to-using-pam8403-as-a-headphone-amp
I also powered it with a 5v cell phone powerbank and after some minutes it started being hot as hell, nearly burning out. Eventually, it got damaged and I could barelly rise the volume. Anything louder than 20% of the original amplification power made the module stop the signal and the speakers cracking. I took another module and i used a 5v cellphone charger instead. It happened the same. temperatures got so high that the module end up damaged. I really don`t know if they have to be feeded with a lower voltage or maybe i got fautly modules...
how to connect earphones to this amplifier`? i understand that - sides cannot be bridged together
I have an ak2515 spectrum analyzer im using in a gift for a friend and I wanted to connect a basic 3.5mm camera mic into it but then learned the difference between mic inputs and aux inputs. My question is if I could use one of these tiny amps as a preamp for the signal? The ak2515 already has 5 volts available onboard. Not trying to power speakers, just make an aux in signal. If there is another method I could use I'm all ears. Just want adjustable gain for the mic to adjust the sensitivity for the spectrum analyzer.
Can you feed the amplifier a PWM audio signal coming from a microcontroller PWM output pin instead of an analog audio signal?
The music clips if i put the volume a bit high on mine, any idea of why this might be?
If your time is valuable to you and you simply wish to hear the amp, ff to 6:35.
Translated into AggroEnglish, or given an injection of testosterone: Holy shit! Get to the point and friggin' plug it in, geeez.
vk
Sarah Michelle tanks
you are a savage, thanks Sarah :-)
Corrected ... FF to 7:23 Nice Review
the second circuit in ur hand wht its name.rly plZ at 4.02
I have no experience with this but have some chips like these I want to try - something I don't understand (and is probably a bit of a dumb question) is what if the input given to this is already digital (PWM)?
Im thinking about putting 5 of these per channel just to see how it would turn out.
hi! i need a mono amp, is it possibile to use only one speaker? leaving a channel disconnected or using a resistor in place of the missing speaker?
Can i give 2 inputs at the same time a Bluetooth reciever and aux??
what will happen if i use it with 2×5 watt speakers?
I made it .but in speaker's..distanbance sound is coming..what to do
what size header pins did u use?
Hello, What is the other board that you have attached to this amp? It looks like some type of MicroSD music board.
Pam8403 it is good audio amplifier I like it and I use it in my arduino rds radio with rda
5807
Is the sound at 8:41 noise from the speakers overdrive or from the amp clipping?
Hey mate, do you think I could use 6 aa batteries and amplify a keyboard speaker? 3 w 4 ohms
My favorite is the YL2020
pleas give a purchase link
Can I use the Audio Module with arduino Uno?
Luc,nice Video! Can you tell me the name of the MP3-Player board.Thank you.
+Reinhold Popp
The mp3 player board is this one: www.aliexpress.com/item/New-Super-lossless-WAV-MP3-audio-decoder-and-player-board-6-12V-DC-supply/32224024044.html
I still plan to make a video about it. I've also recently posted a video about a very similar module - the key difference is that the one in the PAM8403 video supports MicroSD cards in addition to USB flash drives:
ruclips.net/video/QtPzb3DKoNg/видео.html
Can the microphone be used in this circuit? If you can make a video, please play.
It can support 5w speakers?
Do you have issue noise from your bluetooth
what pin are you using?
What is the gain of the little amplifier?
You are right, they are outrageously cheap. 0.99 UK pounds, post free.
The LM386 boards are the same price for 1/3 of the power.
Hi Luc,, I realize this is going back a bit,, just wondering if you can tell me the Resistance value of the Volume control? Thanks mate.
Mine has got a 50k volume control
i want to know the impedance and watts of speakers plz reply
how to buy those pins
input current consumption ?
Hello Luc! I'm already subbscribed to Your vid's. I Want to use for my project one of those amps You work with, and I really love it especially for the reason of having that potentiometer too. My question is about the speakers I want to use: Peiying PY-1010C 4" 60W - 100-20KHz. Eficiency: 88dB/W/m. Like I know every speraker have Maximal (60W in my case) and Musical (unknown) output. Do You think those speakers will fit for the project or not ? I just do not want to hear them clipping. Waiting for Your answer. :)
Hi could you make a video on how to DIY microphone for vlogging?? Or turn a earphones microphone into one? And also a DIY on solar paneled USB powerbank that can be stitched in a tech-bag?
Good night, very cool your video, I would like some help, I am trying to feed with 3.7 volt Lithium battery and 4800 mah, the amplifier starts to cut sound, failing. I increased it, put two in parallel, continued cutting. I put a higher 4.2 volts, model 18650 of 9800 mah, also cut. interesting that with 02 normal AA batteries Alkalinas works super well, sound very good.
Does anyone know where I'm going wrong?
Thanks
I have a problem I hook up my old speakers with the amplifier
but I m getting more sound from one speaker (L) less sound from other
I have checked all the connections and they are fine
please show me a way to solve this problem
try switching your speakers or check speaker polarity
I need help, please, I can connect to a single horn?
Another question ... Really, listen well?
no bro it will not work i tried it
anyone have an idea on how to control its volume with an arduino?
Can the channels be bridge ?
+Justin Kasanwirjo No...it's already in bridge mode internally. That's why you get so much power from only 5 volts. nether side of the speaker is grounded.
In this mini aplifier we are connected 80 watt subwoofer
What is the name of the green plugs you attached to the board. Can you please help
These are variously known as pin headers, dupont pins, breakaway headers. They have a 0.1inch (2.54 mm) pitch, usually come in lengths of 40 pins which can be snapped down to the desired size.
Can you plug a guitar into this amp by punting a jack in-put instead of an mp3
+GenTal1969 It should be easy enough. But you're only going to get about 3 watts per channel. Not exactly loud enough to use as an amp in a band. But could work to amp an acoustic guitar at the beach.
The first model I was buying 10 for 3 bucks I use them in all audio projects I still have probably 20 left, tho they dont have the potentiometer on them but wont just as good
Great...how do you call these green connectors you put on the board?
Header Pins
Thanks...
Houtje Boom - Be Creative aliexpress heeft ze goedkoop
does anyone know if the PAM amp will work with 12v instead of 9v?
5,5Volts MAXIMUM, this is on the Datasheet. (Google it: "PAM8403 pdf")
is that voltage source from power bank 5V ? or how volt?
+Zufar Amanullah Yes - an ordinary 5V USB power bank.
Hi, Have you used any external power source for the speakers too..?
mohd. shariq zafar Actually, I've only tried the 5V mobile phone booster battery to date. But I don't think there'd be any issues with an external supply - I'm planning to use a 5V 1A power supply for my final application.
On instructables.com I found a project that supplied a link to just the board, but I'd like a unit with the potentiometer and capacitor. Could you share that link? Did you say it was ALI? thank you for this video!
fireguardburnt Sorry about the delay - this is the device I bought:
www.aliexpress.com/item/New-Mini-PAM8403-5V-2-Channel-USB-For-Audio-Amplifier-Board-3Wx2W-Volume-Control/32296387716.html
my was working fine ...but after few days it gives hmm (buzz) sound until i play any music ..i am giving power by 5v phone charger
+Niveth Kumar some people says that if you put a capacitor on the 5v input that would be less anoying i think in paralell they didnt say that part, sorry about the mistakes i made on this coment i dont speak or write on english very well
if i powered with a powerbank and 2.1A its better than 1A?
Does not matter, it will only take the amount it needs of amperage and it is much less than 1A www.diodes.com/_files/datasheets/PAM8403.pdf
I want to know about the impedance of these speakers you used . Pls give me the link of this speakers .
+MOHAMMAD Nazmul Hasan Pias The speakers have 8 ohm impedance. They are from Jaycar here in Australa: www.jaycar.com.au/Sight-%26-Sound---Home/Hi-Fi-Speakers-%26-Accessories/Component-Speakers/Shielded-3-15W-8-Ohm-Full-Range-Speaker/p/AS3034
+Mohammad Nazmul Hasan Pias You can check PAM8403 Datasheet. It gives you 3W Output at 10% THD with a 4 ohm Load and 5V Power Supply. Expect less output if you use 8 ohm speaker (all things like SPL etc being equal)
im want to build something like this and have few ideas and will use that amp but im looking for nice speakers and the ones in your video look perfect can you give me infor on watts oms and size?
spinisking these are the speakers:
www.jaycar.com.au/p/AS3034
Shielded 3inch diameter, 15watt, 8 ohm, AU$20 each.
thank you they look great for project im doing
Can I use 12w speaker...Will it work properly?
Yes, 12 watt speaker means it can handle 12 watt, not that it requires 12 watts
if the speakers are 15w like yours and they aren't 3w which the pam 8403 amplifier need. Are there any incidence at battery and amplifier or speaker?
here we have a 15W capable speakers, so if you send them just 3W they are ok dealing with this power, no effect on the battery consumption.
What sets the battery consumption is the potentiometer regulated amplified power.
I mean you get close to 3 times the battery life (at the same given battery charge level) if you output 1W instead of 3W out of the speakers.
+Donato Greco ok thanks you!
Think some 10watt 16ohm speakers would work alright with these amps?
+sumdude4 I doubt you will get 3 watts into 16 ohms. More like 1 watt!! or even less. You will need to use 4 ohm speakers to get the full 3 watts. Note with 3 watts output you will be into clipping. It's really a 2.5 watt amplifier with less than 1 % distortion. Still amazing value for money.
+Michael Beeny +sumdude4 Yes - at 16 ohms the output power would be quite reduced. The PAM8403 datasheet (page 4) says you can expect 3.2W into a 4 ohm load at 10% THD (i.e. nasty levels of distortion!) with a 5V power supply. It drops to 1.8W for an 8 ohm load, 10% THD, 5V supply. So at 16 ohms you can expect less power output again!
The 2x10W PAM8610 might be worth exploring. Modules using it are only a little more expensive, e.g.:
www.aliexpress.com/item/Hot-Sale-12V-Mini-Hi-Fi-PAM8610-Audio-Stereo-Amplifier-Board-2X10W-Dual-Channel-D-Class/32302322145.html
These run off 12V. Again the datasheet doesn't specify the power output for a 16ohm load. I have one of these on order - look forward to trying it out when it arrives.
Does the PAM8403 chip get hot at higher volume? And will attaching a small passive heat sink help?
***** I haven't noticed it getting hot at higher volumes. It's class-D operation should ensure it runs quite cool. A heat sink would probably work, but since the chip is in a small SOIC 16-pin package, there's not much surface area for the heatsink to mount on to.
+Pha Q Mine does get quite hot with 1x 3 Watt speaker on and 5.5V power supply and finally shuts down because of heat.
+Dave P you arent supposed to run it over 5 volts... try running it off usb
***** the datasheet says "The recommended operating voltage is 5.5V" and absolute maximum rating is 6V.
Dave P well shit ive always seen it run on 5 weird
viry good
How menny watt is the versterker?
It is rated at 3W per channel at 10% distortion with a 5V supply. 10% distortion would sound pretty bad, so realistically I'd run this amp at about 1.5W per channel for reasonably low distortion.
Nice...what speakers are you using?
jamesbond4349 The speakers are from Jaycar here in Australia: www.jaycar.com.au/p/AS3034
Shielded 3inch diameter, 15watt, 8 ohm, AUD20 each. Cheers, Luc.
@@LucSmall wow this 3 watt amp is pushing this 15 watt speakers??? Very impressive.
How fare was the volume up on your MP3 player,? 😂😂😂
i couldn't go so loud ! Long before with 8 ohm i had greaaat distorsion. Any ideas ?
Hi bro,
As in any small cheap amplifier kit, there's always improvements to do, like those PAM8403 modules. They follow the minimum design and install the minimum external components around, to keep prices low. Sometimes, there is important points missed.
First, any amplifier needs stability. When bass kicks out, voltage will drop. Add at least, electrolytic 220uF to 470uF, capacitor (Tantalum is better!) between Vcc and GND lines. Add also 100nf in parallel.
Also, please, as general rule: always use decent wires. Avoid those microscopic hair-type wires, horrible! (No need for "Audio-fool" gold cable as well) Make your 5v input the most robust as well. So, less resistivity on the path, better the result will be. Same thing applies between Speakers output pads and speakers.
And, very critical for this device: the Analolg Bypass Capacitor.
A 1uF electrolytic capacitor MUST be used between pin 8 and GND.
Better to have a small look at the Datasheet :)
www.openhacks.com/uploadsproductos/pam8403.pdf
You cannot expect it to go very loud on an 8 ohm speaker in real terms you will only get just over 1 watt of clean sound before you hit clipping. In fact only 2 clean watts is available into 4 ohms. At 3 watts you will have 10% distortion which is mostly clipping artifacts. After all it works in just 5 volts, it's not a PA amplifier.
Just ran some tests on it myself and found that normal usb supply isn't enough current to drive the system. I have since hooked it through the 5v line from a pc psu and got far better results. I would say anything that outputs good current at 5v will do. Personally I'm using one of these to drive speakers on a case mod I'm doing on a pc I use for travel.
My amplifier is making horrible noise what should I do
Suresh Bhatt psu or capacitor
good job. Gbu
Can it use 3.7 volt ?
Yea
Sir please tell me if we connect a 3W speaker to a 50W amplifier what will happen , is this dangerous for speaker or the amplifier ?
Vishal Srivastava for the speaker because the amp is stronger than the speaker can handle
you will burn the 3amp speaker
4ohm?
8ohm?
Yes, the spec is 4 ohm but I run 8 ohm 8" Bookshelf speakers on them with no problem.
They would be louder at 4 ohms.
@@DFaulkner0 thx
Ic heat ho rhi hai kya?
No
hi luc! i've been reading that it is better to have the amplifier's wattage bigger than the speakers, why do you use a 15w speaker in this case? i've bought a speaker from here: au.element14.com/pro-signal/abs-216-rc/loudspeaker-miniature/dp/1504105 and have been experiencing clipping at 5v/500ma, and less clipping at 5v/1a. can you explain/teach me why this isnt a good setup compared to a higher wattage speaker?
+Shang Lin Chua I agree with what you have been reading. In general it is better to have an amplifier rated at a higher wattage than the speakers. The reason is that the amplifier will never be driven to the point of clipping, so the speakers will always be driven with a clean signal. It's clipping that's the enemy of speakers. Of course, if you push it too far and try to put 100 watts RMS into a speaker rated for 10 watts RMS, the speaker will likely burn out, clipping or no clipping!
In my case, where I have a low power amplifier driving speakers rated for much more, I just take care to ensure that the amplifier goes nowhere near clipping. I find that I get ample volume while keeping the distortion low. If I really wanted to crank up the volume I'd use my bigger amp hooked up to my bigger speakers.
I suspect that you get less clipped with the 1 amp power supply because the higher rated power supply can supply more energy during the transients. The amplifier can only work within the limits of the power supply. The 500mA 5V power supply can at most (theoretically, 100% efficiency) deliver 2.5 watts to the speakers via the amplifier. The 1A 5V power supply, meanwhile, can theoretically deliver 5 watts. So the amplifier can deliver more power to the speakers before exceeding the limits of the power supply and starting to clip.
Thank you for the response! I'm getting a little bit of progress, but maybe I just chose the wrong speakers for the wrong job. I changed it with 50mm round speakers 1w from taydaelectronics and have been getting better sound! But better sound with the tda2822m, and ok sound (can be better) with the LM 386. So if I use 1A 5v power supply, 5W is greater than 1W (speaker) is that right?
What is the required power for a PAM8403 board
5v upto 5.5v
@@atendimentoplayzz2705 in Amps?? I've been using a 5v 2.0A adaptor for power supply which seems to be not enough
I think you may have burnt your board
Cuz it uses a charger which outputs 1 amp
@@atendimentoplayzz2705 but isn't it DC output ??
got 20 of them without the volume thing for 5,57
When i m increasing volume it stopped working
i think you are using a higher than 3amp speaker
bro it can support 3.7V Li-ion battery or not
of cource. It works till voltage is lowered to 2.5 V
Nazmul Hassan It can, but be sure to use a protection circuit in conjunction with the battery.
my little sister have one tower bluetooth speaker with this amplifier but necessite to plug with a transformer , i think after put a li-ion battery for use outdoor ^^ the power consuption not exeed +/- 300 ma
It does, however it will not put out as much force. Best is to stick to the 5 Volts it needs using two 3.7 Volt cells and use a cheap voltage controller board to level it to 5 Volts.
www.amazon.in/s/ref=nb_sb_ss_i_8_7?url=search-alias%3Daps&field-keywords=chauhan+abhiyantriki&sprefix=chauhan%2Caps%2C636&crid=J288HWAHCQK2
How to use 40 watt speaker this amplifier board
Use the size of speaker??? Thank You... God Bless You...
paulus masoso ..
Speakers name?
+powerbass007 HiVi Research M3a i presume.
+GlennnD M3n i mean..
+TheMajster007 ___Luc Small.
THX
15fps?
Bro. give me your facebook profile link want to send you req.
Pls reply
Chả hiểu gì
cha hieu tieng gi
Цифровой усилитель звуковой частоты 2 x 3Вт 5В, PAM8403, Класс D
ток потребления на 3ват около 20мА, звук очень хороший для данной микры . (более 4ом динамики лучше не подключать) качество отличное
покупал тут
alipromo.com/redirect/cpa/o/o57qbn0767a9di6glxwlva6jj9e7mwgg/
Siapa yang orang indonesia like
You don't need to keep moving things about in your hands, better to put them down on the desk. And be a little zoomed out. The first 3 minutes were painful to watch, waving it all about.