Speaker making strange sound when muted

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Spykerwolf
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Joined: Sun Jul 11, 2021 5:26 am
Location: New Zealand
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Speaker making strange sound when muted

Post by Spykerwolf » Tue Nov 02, 2021 6:13 pm

Hi guys. I'm hoping someone could help me wire up the volume wheel. It's 5 stereo, but only hooking up mono.
So far the headphone jack works & the speakers work whenever I unplug the headphone jack.

Headphone jack: PJ-325
headphonejack.PNG
headphonejack.PNG (105.06 KiB) Viewed 2994 times
Volume wheel: B103
B103.jpg
B103.jpg (31.28 KiB) Viewed 2994 times
Amplifier: PAM8403 green
amplifier (1).PNG
amplifier (1).PNG (294.28 KiB) Viewed 2994 times
The wiring is:
Low pass filter - Headphone Jack - Amplifier - Speaker.

I currently have the volume wheel connected between L in & Speaker - on the amplifier. Everything is connected to the left output speaker in mono.
The volume wheel is working if it's not completely muted, but makes a horrible noise when muted.
The same noise occurs when I plug something into the headphone jack.
I tested using a different potentiometer & got the same issue, so much be wiring?
Any advice would be appreciated, thanks!

This is the sound it makes:
https://www.youtube.com/watch?v=QSOrxcnuXq4

User avatar
Spykerwolf
Posts: 26
Joined: Sun Jul 11, 2021 5:26 am
Location: New Zealand
Has thanked: 4 times

Re: Speaker making strange sound when muted

Post by Spykerwolf » Wed Nov 03, 2021 6:12 pm

Turns out through many koffie breaks & swear words...the problem was the potentiometer.
Connected a different one (5k) and it's working as expected. Now to wait 3 months for my replacement ali express one to arrive.

FRGEGHEH
Posts: 1
Joined: Tue Feb 22, 2022 10:38 am

Re: Speaker making strange sound when muted

Post by FRGEGHEH » Tue Feb 22, 2022 11:05 am

the problem was the potentiometer.

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