# Passive Volume Attenuation schematic

**URL:** <https://lookmumnocomputer.discourse.group/t/passive-volume-attenuation-schematic/3484>\
**Category:** DIY STUFF\
**Created:** [May 5, 2021, 5:35pm UTC](https://lookmumnocomputer.discourse.group/t/passive-volume-attenuation-schematic/3484 "2021-05-05T17:35:44Z")\
**Posts on this page:** 6\
**Page:** 1

<div class="post-metadata">

**Author:** ![dsorce](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dsorce/32/2580_2.png) [@dsorce](https://lookmumnocomputer.discourse.group/u/dsorce)\
**Post date:** [May 5, 2021, 5:35pm UTC](https://lookmumnocomputer.discourse.group/t/passive-volume-attenuation-schematic/3484/1 "2021-05-05T17:35:44Z")

</div>

I would like to take a stereo input and then turn a pot that passively turns the volume (all the way) down. I feel like its not complicated but could be…  
these kinds of instructions make sense to me

 ![image](https://global.discourse-cdn.com/free1/uploads/lookmumnocomputer/original/2X/4/4393d43583e2ceddc9d6f7977d5e28a20c7d997a.png)  
Is it as simple as wiring a pot to the input?

---

<div class="post-metadata">

**Author:** ![Dud](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dud/32/610_2.png) [@Dud](https://lookmumnocomputer.discourse.group/u/Dud)\
**Post date:** [May 5, 2021, 5:56pm UTC](https://lookmumnocomputer.discourse.group/t/passive-volume-attenuation-schematic/3484/2 "2021-05-05T17:56:13Z")

</div>

It’s a high pass filter schem, for volume you need a simple attenuator like this

> [@Glossary (wiki)](https://lookmumnocomputer.discourse.group/t/glossary-wiki/528/5):
>
> Passive Attenuator :

---

<div class="post-metadata">

**Author:** ![analogoutput](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/analogoutput/32/29663_2.png) [@analogoutput](https://lookmumnocomputer.discourse.group/u/analogoutput)\
**Post date:** [May 5, 2021, 7:58pm UTC](https://lookmumnocomputer.discourse.group/t/passive-volume-attenuation-schematic/3484/3 "2021-05-05T19:58:41Z")

</div>

For a stereo signal you need two of them, and probably you’d want to use the two halves of a dual gang pot instead of two separate ones.

---

<div class="post-metadata">

**Author:** ![irregularshed](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/irregularshed/32/30374_2.png) [@irregularshed](https://lookmumnocomputer.discourse.group/u/irregularshed)\
**Post date:** [May 6, 2021, 5:25pm UTC](https://lookmumnocomputer.discourse.group/t/passive-volume-attenuation-schematic/3484/4 "2021-05-06T17:25:10Z")

</div>

Also note that for audio you’ll want a logarithmic (aka audio) pot, not a linear pot - otherwise you’ll end up with a large part of the pot’s turn being wasted and all the actual adjustment bunched up at the end. They have values like A100K (on the schematic Dud linked to there’s an ‘a’ in a circle on the pot) as opposed to a B100K like on the schematic you’ve put up.

---

<div class="post-metadata">

**Author:** ![dsorce](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/dsorce/32/2580_2.png) [@dsorce](https://lookmumnocomputer.discourse.group/u/dsorce)\
**Post date:** [May 6, 2021, 8:09pm UTC](https://lookmumnocomputer.discourse.group/t/passive-volume-attenuation-schematic/3484/5 "2021-05-06T20:09:30Z")

</div>

All you friends rock thanks a lot!

---

<div class="post-metadata">

**Author:** ![Jos](https://yyz2.discourse-cdn.com/free1/user_avatar/lookmumnocomputer.discourse.group/jos/32/151_2.png) [@Jos](https://lookmumnocomputer.discourse.group/u/Jos)\
**Post date:** [May 8, 2021, 9:27am UTC](https://lookmumnocomputer.discourse.group/t/passive-volume-attenuation-schematic/3484/6 "2021-05-08T09:27:36Z")

</div>

If you want something more elaborate you might want to look into the LM1972 dual channel audio attenuator with mute, or the TDA 1524 stere-tone/volume control circuit.  
Also a panpot amplifier might be of interest as described [here](https://www.analog.com/en/analog-dialogue/articles/ultralow-distortion-panpot-amplifier.html).