Speaker Crossover & Hand-Wound Inductor Coil Made From Trash - Extremely Temporary Prototype!
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- Опубликовано: 12 янв 2018
- Bill attempts to recreate the low frequency section of a JBL 3110A crossover using trash. Specifically the degaussing wires, large electrolytic capacitors, and ceramic resistors from junked CRT television sets. He manages to finagle and secure a 15” Dayton Audio RSS390HF-4 driver inside of a JBL 4560 cabinet in order to run some frequency response tests. Using free Room EQ Wizard software, a 4-channel Yamaha portable mixer, and a Dayton Audio EMM-6 microphone, he confirms that his proto-trash crossover does indeed start to cut off the frequencies above 800 Hz.
**Remember kids, this is a crummy and cheap prototype that was in use for only a few seconds. Also, yes, the two large polarized capacitors are not wired in such a way as to present as a single non-polarized capacitor. This is not a finished product that could be used for an extended period of time in a loudspeaker. It is an extremely limited use one-off made for demonstration only.**
Inductor Calculator:
www.colomar.com/Shavano/induct...
Room EQ Wizard software:
www.roomeqwizard.com/
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Bill presents in this video. He can be found at renderanything 
Хобби
Very well made and engaging video! I used to wind my own guitar pickups - much finer wire - but same principal in a way. Love this stuff!
Great video and idea.
Nicely done! Thank you for sharing your knowledge.
Here to support your channel! Cool prototype
Thanks, I'm checking yours out and subbing right now.
Liked the voices of the bits & pieces. You made me LOL.. Even when I don't get everything you're talking about, I like the explanations provided, simplifying complex processes in a way I can understand and it's always fun to see what you come up with in your little workshop.
Nu știu
Effectively, a spool of enamel coated wire is in itself an inductor. Measure the "L" when it arrives, you may get lucky. LOL.....the demo was a great example of old fashioned practicality. Thanks for sharing. Homebrew 2nd order low pass. Not too shabby.
Thank you sir for capacitors information..
Pretty rad Dude!
Tanks, the coil tip was great
Nice job sir.. thanks for this..
Hey thats FANTASTIC no really you got me
Very interesting video!!
Me gusta como usa tu conocimientos para darlos a los demás
Quantas voltas tem essas expiras ? E qual diâmetro ?
Finaly i found a guy who actualy MAKE his own stuf....Other videos i found here on YT are based of bought parts from varios electro shops on internet.
P.S.Sorry for my bad enlishg,i`am from Serbia.Pozdrav svima/Hello to y`all
Don't be sorry, your english is good enough :D
Thanks for this.
لو حضرتك فاهم فكرة التجربة باختصار ممكن تقولي لاني مش قادر افهم ؟
Really good and informative video.Hit the button and liked.
This x-over is more than enough, made in the day for 20 watt amps.
One tweak that you could've done was to reverse the polarity of one of the series capacitors, therefore essentially turning it into a true NON polarized capacitor, (which is what you really want for audio purposes), but as you wired it, it was still a polarized, (i.e. DC voltage rated), capacitor, which isn't the best thing for an audio signal, as audio signals are of course AC voltage.
The inductor value is determined more accurately by coil size, wire gauge and cutting your wire length, no need to count the turns. The inductor may then be turned in a drill, so you'll have less time and effort and tighter tolerance to what value you want. There should be info online about inductor value per coil diameter, wire gauge and wire length. (I have a book containing this info)
TheFRiNgEguitars в5?мыс
Thanks for sharing your knowledge on a diy crossover. I would also like to make one of my own but need to clarify if certain things would be possible.
Mind your fingers with that saw!!!
The intro and the Hand was fucklng Awesome!!😂😂😂
Hard penis
Thanks
I hope to do this one day ! Im been interested in the electronic hobby. Im new but willing to learn
No speak inglés. Lo que haces es genial 😊👍
Grazie per il bel video...puoi dirmi con quale programma per p.c. e con quale microfono hai effettuato il test ????? Grazie...
The program is called Room EQ Wizard, and the microphone I was using is a Dayton Audio EMM-6 that came with a calibration file specific to my individual mic.
good vid , lloks like plumbing solder
Awesome
The polarized caps in series should be connected + to + for making up a non-polarized cap. Crossover caps MUST be non-polarized, otherwise a useful video.
what about parallel connection ?
expert20valvehlx still need to me non-polarized
It should be done "anti-parallel": this is parallel with + of cap 1 connected to - of cap 2 and vice versa.
You seem to know your stuff, what does the ten olm resistor do in the curcuit around 8:15 do?
Good lesson seen
Wow!!! Nice boss.
hello, how are you, my friend? can you tell me how many meters of wire should i use for each frequency, and what thickness? thank you so much. like
Dipping copper inductor coil in tar or roofing tar dampens the ringing of crossovers. You see in MacIntosh builds for a reason.
Muito obrigado
Interesting - although I wouldn't call copper wire trash exactly, people pay money for copper scrap. I hope you soaked the coil in polyurethane anyway to prevent vibration of the windings against each other, significant forces are present once you turn the volume up.
Copper is pretty great for scrappers. This stuff was a pain to get to though, and IIRC only one of the half-dozen or so CRT TVs that I've come across have had copper with the others all being aluminum in the degaussing wire.
If this crossover was going to be used for any length of time instead of just being a sort of demonstration exercise, then yes, that is a really handy tip about keeping the windings from vibrating and rubbing through their coating.
h
Good sir and thanks do mor in that tipe invention
sir what is the value of small capacitor there? I cant zoom in diagram ..tnx
I never bothered to read up enough on passive crossover layouts to figure out what all the different configurations are supposed to accomplish. This schematic was designed by an engineer at JBL sometime in the 1970s or earlier. It is for a 4560 cabinet / 3110A crossover. You can search online and find the 3110A schematic in PDF format.
Nice Sir 🙋
Guys (and gals) Im relatively new to this madness and super keen to learn some more... are there any comprehensive books on speaker build / crossover design anyone could suggest to me?
amazing work! your channel has my support SUBD618
Subbed back, thanks!
Please can you tell me how much circles ill do ??
MUY BUEN TUTORIAL M GUSTARIA Q M LO PASEN EN CASTELLANO GRACIAS SALUDO D ARGENTINA
Everything I build is a prototype.
I need those wire connectors ✌️👍
I would like to build a crossover filter to cut low frequencies from a full range speaker. Cut less than 1000 Hz.The power of speaker is 350 RMS.
Please can someone help me?
What is the resistance of the speaker at 1 khz...
Make sure you tell them you can only use non polarized capacitor in a output audio crossover since the output is ac
that is why you put your capacitor in series so that makes them no polar now but you never expand that
Newbie here, what would happen if you were to use 12 gauge wire instead of what you used? (other than it being harder to wind and take up more space)
If you go to the inductor calculator link in the description, it'll tell you how much wire you need, radius, and number of turns for a whole range of wire gauges.
Hi how can I make my own 12" subwoofer speaker bass crossover or bass filter what capacitors I need and a diagram for it I'm in need of one DIY for my speaker
`so 23 1/2 micro farads caps are best for bass? very good diy vid and kick ass stash
😄
What he has built is a 2nd order x-over. The caps make it 2nd order. Which means the frequencies that need to disappear, will drop off faster than a 1st order (just the inductor by itself).
And the crossover frequency is determined by the combination of the inductance produced by the inductor and the capacitance produced by the capacitor. You can't just blindly pick a capacitor with certain value of capacitance and pair it with a random coil, their values are related to eachother when determining the crossover frequency!
مساء تلخير
@@TheMasterOfNone ok, in making a 1000watts 4x10 with a 150 watt tweeter bass cab, how to know what wire gauge and how many turns it takes so that the tweeter will only receive the 150 watts?
Please share the details of components used
For a crossover, the capacitors must be non-polarized or also called bipolars to be able to let through them an alternating signal like music.
Isso mesmo amigo! Precisa ser com capacitores não polarizados, ou tem que ligar em oposição um com o outro, ou se for polarizados tem que ligar negativo com o negativo.
E mesmo. Ja respondei a outros sobre esse mesmo negocio. Eu modificei a descricao mas ninguem a le.
why drain a lot of wires possible and on the insights of parts to solder
Wire used is ENAMEL COATED - use sandpaper et emery cloth to scrape the soldering wires before soldering or tinning. 👀 Great vid ! WARNING.. removing wires such as this from tv tubes ? CRT tv sets operate via HIGH VOLTAGES such as 7.5 THOUSAND VOLTS and many of the capacitors in the tv sets can STORE high voltages.. The metal often spring like wire around the black or lead coated tube is there to discharge high voltages when the tv set is turned off HOWEVER I have ALWAYS made sure to wear decent rubber gloves when removing items from TV/old Computer CRT units - cutting the cable or harness as shown could result in shorting out a high voltage capacitor in circuit with the wires etc.. which could result in a rather unpleasant bang as the capacitor blows up remember IF you are using metal to cut through the wire harness etc.. Any cutters should ideally be high voltage insulated up to ie 500volts/1KV - Great vid but as said be advised ! You do not want to witness a capacitor blowing up.. OR getting a shock from a capacitor discharging 450volts into you! 👀 You can buy enamel coated wire OR scavenge it from lower voltage newer ie transistor / battery / low power tech. 👀
Use a empty teflon tape case
Interesting
Is this prtotipe in the detector métaux
Plz is this e director métaux ?
Nice attempt, but if you use electrolytic capacitors, you really should use reversible ones, yours don't look like reversible. However, if you connected your to caps correctly, back to back, you will have effectively made a reversible capacitor. Capacitors, generally, should not really be connected in series as they are likely to be slightly different capacitance to each other and will not share the voltage equally. Also, your air cored inductors will have a higher DC resistance than ferrite cored ones made with the same wire, and will therefore have greater power loss. your crossover will have a different performance to one made with proper components
Thanks. Another commentator already beat you to it on the use of polarized capacitors in the video. The likelihood for cascading failure with series capacitors is a good comment too. It was an internal debate whether or not to mention it in the video. I figured that since this was a prototype built from trash and there was no way I'd be using it for longer than a couple of minutes, it'd probably be reasonably safe.
Which value is the small capacitor
blz mano ,.valeu..
Remake your wooden form and coat it in beeswax first so the urethane won't stick to it. but Nicely done, you made me remember my electronics classes in college for my A.S. Electronics degree; Thanks!
If you are making a non-polarized capacitor by hooking two polarized caps in series with their positive or negative ends together, the voltage rating of the cap is equal to the voltage rating of the cap with the lowest voltage rating. In other words you do NOT double the voltage rating (if you want to use the capacitor on AC, as in a crossover).
How about that someone is wrong on the Internet. I don't mean the guy that made the video either.
Hello, how much your prototype ?
cool
Hello from turkey are telling .very nice
i wish i knew english but i know i am sad google i get help from translator
Series is:
1/C= (1/C1)+(1/C2)
C=(C1xC2)/(C1+C2)
The wooden form does not have to be removed. The permeability of wood and air is nearly identical and thus has no appreciable affect on the coils inductance either way. Just don’t use a steel screw thru the form to attach it to the backboard. The steel could significantly increase the inductance.
Quite true. I was removing it each time because I thought that if I perfected the technique, I could wind up using the form for other coils.
An easier way to have done that, instead of counting, would have been to measure the distance of one loop of wire times the number of winds and then cut the wire off and use the lathe to wind it and it would have stopped automatically
Except that if you measured that way, the measurement would only be valid for one layer of windings. The subsequent layers of windings would each be longer than the previous ones.
Start by math formula for inductance see how hard it is to figure out nice tips on turning coils
22 coil gauge How many turns ...?
how about 327 need some return support thanks byw you spent some time on those videos.
Subbing back, thanks!
@ 6'20" series capacitors, on the blackboard, 1/C = 1/C1 + 1/C2, NOT C1/C2!
Isn't it C1 x C2 / C1 + C2 = C12
CME both formulas are correct. C = C1 x C2/(C1 + C2) is a special case for 2 caps in series. Mario’s formula is the general formula for any number of caps in series.
if only i had the time.
I made my own LP for sub, midHP for selected speakers and a dimmer for front to fine tune my 19 speaker setup (18 + sub) =) Also made from parts scavenged from old hardware. I'm wondering though, why lowpass @ 700hz? I would definitely start filtering highs @ around 200hz tops, even lower if I'd have good midrange speakers to go with the sub! It's gonna be 12db/oct anyways with a second order filter so even if you start at around 200hz you'll still hear those 800hz frequencies quietly. Subwoofer is for producing bass after all =)
Ah, this 15" is not a subwoofer though. This was a very, very temporary test setup for a midbass cabinet with a single horn-loaded 15" driver. It is designed to cross over to a horn-loaded compression driver for the high frequencies, and the lower bass frequencies would be handled by a separate subwoofer cabinet.
Love the Bob’s Burgers reference
Класно! блин хочу тоже что нибудь придумать
When crossover get hot the hot gue will be gone
Nice 👍🏻👍🏻 🇮🇳 || Kuki
Hello Salam paz.thanks
Please translate. Thanks. Por favor traduzcalo al español. Gracias.
Great video my friend 👍👍❤️❤️
Hey man !!! You're a Dahmer...👍👍👍
Don't you need to use bi-polar capacitors?
Untuk pemasangan...nya sebaiknya..seris atau paralel.
Bos.. thanks..!!
Tergantung koilnya dipasang di tweeter atau woofer Om..
At time 4:12 the dog conducted his investigation of the wires and was ready to steer the work in a new direction. Yet we do not see him after his contribution - a shame.
inductance is not dependent of the wire material, resistence is
Those “audio connectors” are made of wood for a more natural sound 👍
that was nice touch
Will you please give me one solution, how can I use 3way crossover with range controlar in sansui S3000j vintage speaker?
un capo mr bigotes
ممكن ترجمة بالغة العربية وشكرا
please list everything u used in your project so that i can also try thats if dont mind
What is the diameter and how many laps does it expire?
There's a link in the video description for a website that lets you calculate coil diameter and how many turns of wire you need based on the gauge of the wire and desired induction of the coil.
@@TinyLittleWorkshop What is the diameter and how many laps does it expire?
You can use plumbers plastic tube cut down for the coil 'former'. 22 gauge enamel coated wire available from Amazon or Ebay etc I'm confused re capacitors in PARALLEL and in SERIES ? I was of the belief that in SERIES 1 + 1 = 2 ? whereas in PARALLEL it is 1 (sum of the value ) divided by 1 would = 1? Resistors would be the same.. in SERIES a 30 Ohm resistor plus a 10 Ohm resistor would equal 30 +10 = 40 Ohms. whereas in PARALLEL = 30 divided by 10 = 3 Ohms!! Put an 8 ohm speaker in PARALLEL and you would be in trouble connecting that to an amp output of ie 4 or 8 Ohms as the resistance overall would be 1 Ohm.. !! However in SERIES those speakers would equate to approx 16 Ohms which would not I suspect, be a problem.👀👍
👌👌👍👍👍😍😍
If you want to look like Nikola Tesla you should part your hair in the middle. 😁😜
Good idea to reuse degauss wire, but keep an eye on the coating. Sometime the varnish is too old and just cracks.
At ruclips.net/video/y6oPipWgj3o/видео.html, caps connected in serie formula on the white board.. C1/C2 ? Oups !... Better use C = (C1 x C2) / (C1 + C2) or equiv. 1/C = 1/C1 + 1/C2
Only if they are exactly the same, you can use C = C1 or C2 divided by two.
But if you can use an unpolarized cap, it will be highly better than two caps connected back to back (because capacitance of a inverse polarized caps isn't the same as in the forward direction). This could produce unwanted distortion due to non linear behavior, and in the worst case: destruction of the caps.
I use myself a tiny but powerful LCR meter for my homemade inductance, just visit www.peakelec.co.uk/acatalog/lcr40-atlas-lcr-meter.html
هل يمكن أن تعرفنا على أسماء القطع و رقمها
ابن سوريا مر من هنا👋👋
احسنت
لا أحسن ولا هم يحزنون لم يجرب شيئا في الميدان في البحر يضهر السباح الحقيقي
Online crossover calculators unfortunately don't give results that work in reality. I explain why in my upcoming podcast about frequency crossovers.
I also have a tutorial series where I explain how to design crossovers: ruclips.net/video/5Kvl0iBQ0L0/видео.html&index=2&list=PL4lJ1ej0uWlQjzOstioAZ1bd555vG9WHF
The RC filter in a crossover has to be tuned for each driver individually. You don't even need it if you design the low pass correctly.
Connecting two drivers in series is usually not a good idea. You have to make sure that the have exactly the same impedance curve if you want to do that.
At 10:15 I see the effect with 12 dB attenuation per octave (1 to 2 kHz) but not really a good result. A 3rd order filter or a serial RLC circuit in parallel to the driver would be more suitable to suppress the resonance at 1.8 kHz.
I recommend using the software ARTA for measurement because in it you can apply a timing gate on the measured data to suppress the room characteristcs.
That's some nice information and it looks like you took some good time to put it all together for us. I didn't happen to use an online crossover calculator to design this circuit. This circuit is from a JBL spec sheet for the 3110A crossover and was designed in the 1970s, if not earlier. This schematic was put together way before commonplace computer modeling and all the fun tools we get to use today.
I managed to create a rough, but reasonably close version of it from trash where I had no idea if the tolerances on the components were close to spec and I even wired one of the capacitors backward. It was in use for only a few minutes, mostly for making sure the schematic was correct because I've read about other factory schematics containing terrible errors or omissions. It did happen to attenuate in the correct range, at approximately the right slope for the design. I do agree that if you were designing a crossover circuit nowadays that you'd likely want a steeper slope and plenty of real world testing to verify results.
Oh, and the two drivers in series were the exact same model. Sure, there will be some variations between individual drivers, but eh, it was close enough for the simple frequency sweep I needed to do. I was actually quite surprised that a modern Dayton subwoofer driver in a horn loaded JBL cabinet managed to really closely approximate the factory response, despite having all the wrong driver specs for the cab.
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