Volume Related Amplifier Noise

Thread Starter

Daan Lageschaar

Joined Jul 8, 2019
45
So are you saying that there is no hiss if the phone is plugged into the input and it is not playing anything? If so, then I guess the hiss should not be a problem.

Bob
No, when at Max volume and without a phone plugged in there is hiss, but when at max volume with a phone plugged in there is no hissing

The thing is I'm not using it at max volume so the hissing is always there
 

Audioguru again

Joined Oct 21, 2019
6,674
In my post #19 I showed a graph where the input noise of an opamp increased about 20 times when the signal source resistance increased from 100 ohms (volume control at maximum) to 100k when the volume control is turned down a little.
 

Thread Starter

Daan Lageschaar

Joined Jul 8, 2019
45
allright, but I guess I'll just keep using it like this then :p
it's not easily fixable anyway and for €4 I can't really complain of course, thanks for the help though :)
 
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