How to add a volume control to your audio amplifier project

[@krsslim]

Was wiring a volume pot today & totally remembered the right way to do it without even thinking. For me to remember after randomly browsing this video means you did a great job of explaining :p.

[@kieranblacker]

Ground the pots case! Best thing I learnt all year!!! So basic, so simple but so helpful!! Thanks!

[@kevinlivingston9563]

Very informative video as usual Mr AudioTech! I've seen a lot of inaccurate explanations here on YTube. Now if people could learn the difference between RMS and Max, the audio world would be a brighter place!

[@prashanthb6521]

Thanks for this video :) Not many make videos explaining such small topics in such lucid manner.

[@curtchase3730]

You do a GREAT job explaining stuff! You're like a living "Audio for Dummies" book! Keep 'em comin!

[@vinylbugg3513]

Awesome video! Any chance you could show the actual wiring inside of your case? Always nice to see the actual wiring to see what is what

[@geologist_luna]

You just answered about fourteen questions I had been looking for answers to! Amazing video, very informative, thank you.

[@bobpal377]

The exact info I needed for a project. Thanks for the crisp and clear info delivery. Not a second wasted. I am going to check out your other videos. Thanks again.

[@IUsedToBeAPygmy]

Okay so I have one question left after watching this - how do I add a volume control to my audio amplifier project? :-)

[@cjsastudmuffin]

Lmao

[@klara_k3844]

the answer to your question begins at 7:12; if you did not understand, i advice you not to do "amplifier project"

[@prufrok]

@@klara_k3844 the hardest part is knowing what value to use, for the cheap amps you have no idea what their input impedance is so its just a guessing game

[@klara_k3844]

thanks for answer; i have used 100k pot, works ok

[@tomar81]

@@klara_k3844 worst advice ever. I hope you're not a teacher.

[@jacobdavis000]

I thought I knew this after all these 40+ years since I was a teen. Nope. thanks for straightening me out! I remember working on a electric guitar years ago and I didn't ground the volume pot ground to the case of the pot. I remember it had hum when I wasn't touching the metal on the guitar.

[@snaprollinpitts]

excellent video John, I didn't know about grounding the case of the pot, very good thanks

[@GrumpyTy34er]

So just checking: we replace said resistor with our potentiometer, connecting the outer leads to the input and ground with the output to the input of our amp. That makes sense! Because, like you said, there is a voltage divider affect, so the signal is sort of split between the ground and the amp input. THAT'S why the same guitar pickup wil sound different between 250k pot, 500k pot, and no pot!

[@twistiv]

Nice! I'm making a volume adjustment knob for my desk since I like to fiddle with the volume all the time

[@gerhardschwenkert3154]

Thank you for this very detailed explanation. Thumps up.

[@Elnufo]

How did i end up here again, five years later? dear oh dear :D

[@dtwistrewind7361]

JohnAudioTech I would love to see some videos on swapping out momentary push switch volume controls of Bluetooth amp boards to potentiometers via either the amp chip or the Bluetooth module.

[@Lilzsnr]

Thats EXACTLY why I'm here. Can't find anyone that makes a board with what I want and I can't be the only one that wants a BT board with power on/of lamp that can be wired to the cabinet instead of a tiny lamp on a board that's going to be buried inside a cabinet. Also a MONO amp pcb with facility for a cabinet mounted on/off/volume potentiometer, a 3.5 aux in circuit and a USB flash drive all powered by rechargeable battery via USB to mains supply. I'm new to this kind of thing but the above would be ideal for converting old non repairable radios as BT speakers and I'd but at least ten boards just for the dead radios I already have.

[@Diamonddrake]

That was very informative. Exactly what I was looking for.

[@GaryGolbraich]

What a treasure your vlog is! Love your teaching skills! Much appreciated! You have a new fan!! Subscribed :-)

[@JohnAudioTech]

Much thanks, Gary!

[@tectalabyss]

Thank you John. A very interesting and informative video has always. I Liked ,Shared and added to playlist. All my best. Bobby

[@mauritsvw]

Thanks! Clearly explained so that anybody can understand, with visuals to match.

[@bluesman608]

Fantastic video. I always wanted to know. I think I could do it now. Thanks John.

[@jasonlaverty76]

Cheers, I never gave a thought to grounding the pot case. I will from now, Thanks.

[@hightttech]

You make very good videos.

[@gord2728]

Thanks so much for taking the time to make this video, helps a lot

[@Bobylein1337]

Thanks for this video! Helped me with wiring the potentiometer in my boombox and is easily understandable :)

[@johnhopkins6260]

Consider: in-line volume control; RCA - IN - "Source" jacks to RCA - Output jacks: As I recall, most home HiFi RCA outs range around 10K, so... 10K audio pots... RCA "source" center to pot Pin 1("IN"), Pin 2 to RCA center "OUT" , RCA shielding, both "source" + "OUT" to Pin 3... or isolate RCA shielding "source" from RCA shielding "out" with cap? (Gnd lift at in (source) jacks or out jacks?)

[@timothytimmmedrano3132]

I hope you can still answer my question here JAT:) Awesome videos ive been binging on them since last year when I got into audio. I have a tube preamp (buffer) a 6j1 variant you have reviewed and I think the volume put attenuates the signal from my DAC. I have connected that to a power amplifier with an input attenuator to the power stage directly as disabling tone/preamp controls, I can still control the volume. How should I adjust the two volume knobs? Max out the volume on the 6j1 preamp and control it from the power amp or the reverse? the power amp uses a stepped attenuator and the preamp uses a carbon wiper i think. its says b503

[@BlackyZE]

Hey, you make great videos ... Any idea how to solve my problem. I have TDA7297 amplifier thay I buy at Ebay, with 50k volume potentiometer. Situation without input signal. If potentiometer knob is in middle position I get noise, but when knob is all the way left (MIN) or right (MAX), noise is disappearing ...

[@coondogtheman]

I have this chinese bazooka tube style bluetooth speaker that has an FM radio. When I turn the radio on it blasts at full volume and I have to turn it down. Is there any way to add in a potentiometer to the speaker wires to allow adjustment of the volume? I bought a kit of pots and none of them worked. I think I have the wrong ones. the 5k one sort of worked but no sound until 3/4 of the way up then full volume. I will be using only two of the wires. I just want to vary the audio signal going to the speaker

[@mrmshifan]

Hi, Thank you very much for the detailed video. But a question popped up after watching it, hope someone will answer. Why do we need to connect the ground to the pot, can't we connect just input?

[@JohnAudioTech]

Ground is needed to make a complete circuit.

[@simplygame5530]

hey jhon, can I use two pots one for left and one for right channel insteal of single 6 pin pot?(I would like to use two 2.2k pots for my lm1875 with 7.5k input resistance)are there any disadvantages of it?great explanation btw!

[@johnbobbitt6470]

thanks for making this. i have noticed that when seatching for how-to videos, that i do so already pretty much knowing what im gonna do. Theres just one elusive piece of verification i want to check on. and you have to sit through a 20 minute monolog of why the guys doing the video, an intermission to introduce his pet lizzard to society, and a brief appology for the horribe stock music being so loud in the background. Thanks for approaching it with the "If they googled petentiometer...they probably will probably prefer a nerd answer, because they already kniw what it IS." attitude. thunbs up

[@silvatraoz2615]

THANKS JOHN VERY HELPFUL TO ME

[@pradeepmokkapati4579]

What value pot(potentiometer) should we use for volume ,bass n treble individual??

[@handy7390]

I have a pot that has 7 lugs. 6 are stacked so it is a dual but the 7th is off to the side by itself. Is that a ground? Would I use that to ground the other ground lugs or leave it alone?

[@abhinb1998]

Nice work as usual

[@jasonneal]

Really enjoyed your video. I have a question. I have a set of RCA’s going from my car stereo to a amplifier. The signal playing through this channel is only bass, about 100HZ and lower. On some songs the bass is too strong so I wanted to hook one of these pots to reduce the signal. Am I correct to get a dual A50k ? There is a left and right signal on that channel. Thank you for any help

[@klara_k3844]

thanks for explanation; what pot should i use for smartphone to tda8561q amp? 47k or greater? max output signal of the phone at 1kHz is 900 mV

[@noi5emaker]

Brilliant stuff! So can I simply put this inline with the speaker output jack?

[@Diamonddrake]

no, putting it after the amplifier changes the impedance of the speaker load which is very bad for your amp and can cause it to overheat. You want to put it on the input to the amp to attenuate the unamplified signal, for example on the wire coming out of your headphone jack on an MP3 player going into the amp's input.

[@a-listercrowley2737]

Dude! Friggin thanks brother 🙏

[@johndon3782]

How would I go about creating a balance for my speakers just two pots?

[@highhat5229]

John Don did you find an answer? I'm curious too

[@rmhutchins7]

I enjoyed your video. It was very helpful. Thank you!

[@staLkerhu]

Hello there! I have a question which you did not cover in the video (if I'm not mistaking). How should I choose the load capacity? I've found logarithmic pots from 0,05W to 0,2W. Is there any recommendation or rule which should be followed? 🤔

[@JohnAudioTech]

If it is a line level signal, say about 1 volt rms, the power is very small. No issue there. If you're controlling a higher voltage, that's when you need to be concerned about power dissipation.

[@samthemusicmad311]

Have seen people adding a cap to the Volume Pot with an intention to reduce treble bleeding (?) Or DC protection.. Does it really needed to do so? Thank you

[@jemdost6724]

Need help adding dual individual volume knobs to control two separate channels and need help. I'm open to a DIY and can solder....but would like easiest and cleanest way possible with a budget of say around $30 So I have two bass shakers/transducers installed on my couch. They are single voicecoil 8 ohm 300 watt rms max each. I will be running them in their own channel into a crown xls 1502. I would like 2 volume controllers to adjust the intensity essentially of each shaker individually. The amp has built in band filter so I will be using that to get only the desired frequencies from movies. I have found some zone volume control boxes but cheapest is around $60 and says it can only handle 100w. I thought about using a dual wall mount plug but also only does 100 watt. I found single 300 watt but $50+ I thought about using a passive line mixer there are a few 4 channel ones for around $30 but they only have single coax input and only one coax output. (The crown amp accepts XLR which I won't be using but also accepts bare speaker wire or banana plugs I'm thinking about using a RCA bass knob adjuster $7 x 2. They have + - for each in and out. Thinking to splice the positive negative to speaker wire. then plug in the other + - to each channel on the amp directly where the speaker wire normally hooks up to the channel. Will this work? If so, how can I tell to get one that is good enough for the 300 watt rms per channel that will be passing through it? Also hopefully I can find specs to find one that is a audio taper but if not does it matter too much? if this will work any other cons I should know of? Or any other better routes or options? Any replies from people with knowledge would be very much appreciated. Cheers!

[@vtec230]

Finally... Thanks man... Great video 👌

[@uesleiporto]

How can i select the right pot value to a certain amp impedance?

[@sandyshoremann7524]

In this noisy RFi world do you think it would be advantageous to add a low pass network - say 50-100Khz - at the amp input? I knew this stuff 35 years ago but a confirmation refresher is always welcome. Sandy.. ( BTW my Xfinity X1 box analog audio out appears WAY above the 2V p-p max std and overloads my Wireless headphone input. Thinking a simple voltage divider in the cable box to attenuate the signal - not the best place but no room in the headphone transmitter base .

[@JohnAudioTech]

All proper audio amplifier designs should contain an input lowpass. Yes, you could use a divider to attenuate the audio. Be sure the value of the resistors will work with the audio out properly.

[@sandyshoremann7524]

@@JohnAudioTech Thanks for the reply :) You see a lot of amps promoting crazy wide bandwith and DC straight through. Never thought it was a good idea and now more than ever! ON my problem I was thinking of using a 10K and a 20K for the divider. with the 20K at the GND leg. Maybe I'll make a little 1 inch cube "dongle" with male RCA at the correct spacing to plug into the cable box, this way I wont have to add another set of audio signal cabling. I'm plugging in my Sennheiser RS120 wireless HP in there. Im a really fan of eliminating signal jack and plug friction interfaces. Seems to " lift a veil" from the signal for every one removed. I don't know why Xfinity is using a non standard Audio pre out over 4V P-P. Outrageous! Makes me REALLY mad.

[@alionur54]

Hi John. I have a TPA3118 mono module. I modded it, decreased to 20db gain. I added a potentiometer for volume adjustment. The pot when full and zero level no noise but at middle levels i m hearing noise. How can i eleminate this problem?

[@Totogita]

Thank you for posting this info it brings a lot to light.

[@mfowler8808]

Add 10KA to 100KA volume pot to the input of amplifier module and float the ground connection of the pot with the other grounds of your amp. I added a 20kA pot infront of the Sure 600w Class D module Parts Express sells, just remember not to ground the pot to chassis.

[@Helectronics]

I forgot to solder ground wire to the case of the potentiometer and one of the audio amplifier IC in my homemade amplifier system burned out because of electrostatic discharge, only by touching the knob. It is very important to solder ground wire to the case.

[@dehved]

John, thanks for making these videos. What value of LOG pots are generally used in various type of applications? IE preamp, final stage amp.... ? That was the reason i watched this and no mention of values... haha oh well.

[@JohnAudioTech]

It depends on the application. They can range from 1k to 1 meg. I like 10K pots as the impedance is high enough for most circuits driving the input yet low enough to keep much of the received electrical noise low provided the shielding is good. This, however, isn't ideal for some circuits.

[@ford1546]

Hello. Hope you can help me? when I connect a stereo potentiometer correctly to an amplifier, there is a short circuit between R. L. on the output when I turn the potentiometer to one side. this is because minus GND. on R. L. is connected. together. Miter stick goes to amplifier and one side is audio input and the other side is GND you ruin the stereo image in the music!

[@shantk7378]

Hi John. At 5:55, when you say "half of that or less in resistive value", do you mean half the Ohms? i.e. Amplifier input impedance = 1K, therefore use a 500 Ohm or less, or 2K plus?

[@Cylon39]

Yes, Thank you. Well explained and of great help to me.

[@gamingit1]

Is input impedentance same as input resistance? For mine (dta2822d) its 100k ohms so i need to use 50k ohms resistor?

[@nyc1655]

I want to add volume knob to my digital deck in car instead of pushing buttons I’d rather have the volume knob any ideas of how I can hook up?

[@myHorribleMusic]

Thanks for this video, dude.

[@amitghosh6966]

I have an LA4440 amp board and according to its (LA4440) datasheet it's input resistance is 30 K. I connected a 47 K POTMETER but I can't increase the volume to maximum as there's distortion if I do that. According to you, the volume pot should be half the input impedance but I am not getting a 15 k pot here , only 10 k, 22k and 47 k pots I am getting in my local shop. When I reduce the volume of the usb mp3 module I am using as source, the distortion goes away but I can't use the source volume all the time as its not smooth. So tell me what to do to reduce distortion while increasing the volume to maximum ?

[@AlexIstEinGott]

The kit im gonna use in my first project already has 5 buttons on it.

[@KevinDay]

Have you read The Secret Life of Pots article? You can find it online easily by googling the title if you haven't. Explaining it might make a decent follow-up video to this, especially the part about tapering resistors.

[@JohnAudioTech]

I have not seen that. Good info. Looks like you can use a linear pot of the right value to give you an audio taper effect using an extra resistor (or perhaps the amp's own input resistance).

[@KevinDay]

JohnAudioTech I was considering the possibility using the amp's own input resistance, too. The only real caveat to this technique, as he mentioned, is that the effective input impedance varies with the position of the pot, and at max volume, it's the value of the tapering resistor. It might not matter in most cases, but for example, if you want a 1 Meg minimum input impedance for a guitar amp, you'd need a 5+ Meg pot, which aren't particularly common.

[@SianaGearz]

I picked up the trick of biasing a linear pot into audio taper from Elliott Sound Products website about 15 years ago, i think everyone should read that website in its entirety, it's awesome. The site starts right off with that, Project 01 - Better Volume (and Balance) Controls. And yes it works very well, feels so much better than a usual cheap audio taper pot.

[@amitghosh6966]

1. If the source signal is very strong or having high gain, then will adding higher value potentiometer like 100 k reduce distortion or clipping at maximum volume when potentiometer is turned fully ? 2. If I don't get potentiometer according to the input impedance calculation as you told then what value should I use ? Suppose the input impedance is 30 k but I am not getting 15 k , so can I use 22 k which is available ?

[@JohnAudioTech]

1. The potentiometer resistance should be selected giving the input impedance of the circuit. 2. That would work, though I'd probably use a 10K in that case.

[@amitghosh6966]

@@JohnAudioTech what are the advantages in changing the input impedance of any amplifier ?

[@jamesrellinger]

I've watched a dozen videos on this subject and they are all the same so, I connected my audio pot this way and the result is virtually no volume until the last 10% of rotation. In that last 10%, I go from nothing to full volume...however...if I reverse the leads, so that right is low and left is high, the graduation ratio is perfect. Do I need to use inverse log pot to resolve this issue?

[@jezreesantos4375]

Where should I connect the amplifier input if I have an Ic that has 5 pins, there’s a non and inverting one

[@andybibby342]

hi great post. what value k pot would you recommend to resist an audio line out for headphones out. have a small practice amp with a headphone out with a set level. regards Andy

[@JohnAudioTech]

I would not recommend a control on the headphones output, but it can be done. There is a device called an L pad that might work. You could use a small low power rated one.

[@premiere3610]

Thank you. you are the best in this world

[@MrJerzy624]

Can you do one for the balance pot? thx

[@rishiktiwari]

I am using the ne5532 opamp and get low volume signal at the output when the opamp is NOT powered. How do I fix it? My input source is a phone connected via Aux cable.

[@jimmcgarvey3855]

John, Great video. A couple questions from someone over their head: I’ve made a couple lm1875 kits with your dual voltage source circuit, both inspired from another vids of yours and want to add volume control. Does a 2.2k Pot sound right and does the ground go to the virtual ground?

[@JohnAudioTech]

Hi Jim. The resistance depends on the source. For line level sources, I'd go with a 10K pot, with signals from devices with a headphone jack, lower would be fine. Yes on the virtual ground.

[@jimmcgarvey3855]

@@JohnAudioTech Thank you so much for your reply. Very excited to have received it. Love your videos.They have introduced me to a new hobby.

[@jedijohnjohn8663]

IS The GND side of the pot MAX R?

[@Aisaaax]

Hello. I'm trying to hook 2 volume controls to my amp - a separate control for each channel. I start with 3.5 jack input. Then each channel is put through logarithmic pot, and in the end they come down to 2xRCA setup, which is what is plugged into the amp. I can test the setup separately, by sumply converting 2x RCA back into jack via adapter and plugging in headphones. It works just like it should - the volume in appropriate channel gradually decreases as I turn each handle. However when I put it through amp, even a slight turn decreases Amp's output drastically. Basically, it goes to nothing withing a couple degrees turn of the handle. People explained to me that what I have is "gain control" and that it affects AMP's output exponentially. Is there a way to wire what I'm trying to do without disassembling the Amp itself? I'm new to electronics and I'm not confident. I have "Breeze Audio TPA3116 Mini" - you even reviewed it on the channel. Thanks for the reply!

[@sandyshoremann7524]

This reads like you wired the pot incorrectly. RE-view video above and make sure you have the GND and the signal OUT soldered to the correct lug. Wired and Working correctly: Signal OUT should be soldered to the centre lug (wiper) Next confirm correct GND by turning the control anti-clockwise and get out your VOM and measure a LOW impedance centre lug -to-GND lug and then a higher impedance across signal IN and the center lug signal out. HTH

[@westbay5858]

Does JohnAudio reply to comments?

[@HKey_Root]

Interesting but off topic. I suggest you rename this video to something like 'How logarithmic and linear potentiometers works.'

[@pinkysinha728]

how many k use in home theater volume controller

[@jackkhol4251]

I always heard linear was better for audio (mainly for car audio / bass amplifiers ) than Log pots.

[@Jcyber15]

I want to adjust the volume of my stereo amp channels individually but I can't figure out how to wire each channel to two potentiometers.

[@JohnAudioTech]

With the rotating shaft of the pot facing you and lugs facing up: The right lug is ground, the center goes to the amplifier input, the left lug is your signal input. Of course, one pot would be wired for the left channel, the other for the right.

[@Jcyber15]

K. Thx for that

[@Jcyber15]

Is it power GND or jack GND?

[@Jcyber15]

Figured it out. Its the jacks GND

[@techeadache]

8:52 Not sure if there is a way of grounding a sliding potentiometer. Maybe I'll just have to make the case out of metal.

[@JohnAudioTech]

You can ground the casing (if metal), but not the slider itself. That would probably be enough.

[@MiiMaker]

Where do I buy these? I can't find it somewhere.

[@saiplectrum9036]

My potencemeter is gone ... Now how do i bypass the circuit to make it work without it?

[@yashwantkumar3233]

How to get rid of buzzing noise? I have connected my home theatre to a Bluetooth module, and it is giving me buzzing noise

[@Elnufo]

very good, thank you :-D

[@EvaldasKriatovas]

Thanks 👍

[@ntoobe]

Useful vid!

[@MrKoenvandijken]

This is maybe a stupid beginners question, but why would you place the volume control on the input, and thus losing signal strength and thus getting worse signal/noise ratio instead of placing the pot on the output?

[@JohnAudioTech]

The pot would have to be able to dissipate a lot of power. It would spoil the damping factor of the amp and cause frequency response issues because of the way speakers have varying impedance across the audio band. Best place for it is between the preamp and power amp.

[@mifo1133]

i want to build volume know for my active JBL LSR305 speakers. But wont find input impedance anywhere. Can i use 500Ohm for example? and be safe?

[@MarcosLucas]

nunca le preste atención a como conectar el potenciómetro :/ buen video jonh!!

[@gevinduubayasiri1253]

good vedio 👍

[@leohobbleohobb3781]

I have a lc audio MM riaa phono stage with built in buffer.it has to high output to connect direct to aux or line input on a preamp.I tried it with my stax headpseaker amp with 21 step autenator and no distortion.can i use a potmeter or autenator 10kohm on the output of that riaa s phono stage?have trided and it works.But if it make the bass week i wonder if it is another way of doing it.have it connected so the riaa phono stage see 10kohm always.wiper arm goes to amplifier

[@leohobbleohobb3781]

confusing the part how to hook up.you mix up input and out and not clear input of what.

[@fuzzybee5988]

hey john, i might not understand this from the video, but wher do you connect the wiper arm to? the vcc or the audio input? again, i'm sorry if you said it in the video, but i'm not a native enlish speaker, so i might not understand everything you said.

[@JohnAudioTech]

Connect the wiper arm to the input of the amp.

[@bassblaster505]

Hmmmm, ive always used linear pots and never really noticed the spike in volume

[@JohnAudioTech]

Not really a spike, the loudness shoots up faster at the beginning rotation starting from 0 and is already 80% loudness at only about 30% setting from 0. I see this a lot in cheap radios and cassette players of the past. If you use a linear taper pot that has a resistance much higher than that of the amp's input impedance, you get an audio log effect.

[@CurvedSlightly]

Dude, I'm using a 10K pot but it has noise (scratch) on low volume, I'ts not dirty, can I use a capacitor to reduce the scratchyness getting to the amp?

[@JohnAudioTech]

If you get a scratchy sound when adjusting the pot even when no music is being played, there is some DC current passing through the pot. You can use a capacitor to block the DC so as long as it is not effecting any bias currents the amplifier might need for proper function.

[@CurvedSlightly]

OK, I added a 5K resistor before the pot, that seems to have reduced the scratchyness, what's going on there? Also, I am using an LM380 in BTL and connect the input to one end of the pot to the input which goes thru a 5K resistor, the 'ground' end of the pot to the inverting input and the wiper to the non-inverting, this works really well, it's a log pot 10K and this method really smooths the volume. Also, is there any way to us the pot in such a way that there is always something playing? In effect, there is no zero volume? This way, people know, even if they turn it right down, there is something playing?

[@JohnAudioTech]

There could be a few millivolts of DC going through the pot. A resistor would lower the current. Did you try a capacitor? Isn't the inverting input on these normally grounded? If so, add a small value resistor between the grounded side of the pot and ground. This will allow some signal to pass even if the pot is turned all the way down.

[@linandy1]

thanks

[@jj74qformerlyjailbreak3]

7:00 Only way I’d do that is if it were a pre-set trim pot, for Worst case scenario. And it wasn’t accessible to anyone.

[@MrBrymstond]

What's the difference between the Amplifier Source and the Audio Signal?

[@johncoops6897]

An audio signal is audio of some form. This signal might be on it's way in, on it's way through a circuit (like an amplifier) or it might be audio on it's way out of the amplifier and going to the speakers. An audio source is where the audio comes from.... the source of the audio. The Audio source for an amplifier might be an MP3 player. The audio source for a loudspeaker might be the amplifier.

[@GaryGolbraich]

Hey, what potentiometer value would you recommend with this LM1875 board kit you already reviewed here: kzbin.info/www/bejne/mmqyaKKQer50gqs Can you recommend on a specific company or seller for a reliable logarithmic potentiometer?

[@MrBrymstond]

Okay, let me say it this way... Your amp has a input for the source, it has three pins left, common and right, do you add the pot before and how because the pot has one for audio source and one for amp input and one for ground so where does the left and right come in? all amp are not the same and doesn't have the extra options.

[@johncoops6897]

The left and the right means it is stereo. That means TWO channels. So, if you want a potentiometer on a 2 channel stereo amplifier, you need a 2-channel potentiometer. This is called a dual-gang or "stereo" pot... it has 2 completely separate potentiometers with a single shaft for one knob. Such a potentiometer has 6 terminals, 3 for each channel.

[@MrBrymstond]

Yes, I knew this but it would be nice if that was shown, it was half way finished.

[@SianaGearz]

A stereo potentometer is just two potentiometers stacked back to back with a common shaft... you run the signal through the respective potentiometer, and connect the wiper pins to the left and right channels of the amplifier... it doesn't matter which potentiometer in the stack you choose to be your left or right channel.

[@bonytologna]

Booger hooks! Hahahah! Fantastic

[@shovanbar2823]

song sprid plice sir