I've builded a simple amplifier (just stereo audio in, two speaker outs) and I'm building a mixer for it.
EDIT: The schematics is wrong. To wiper is connected output, not ground. To resistive strips is connected ground and input.
But when I connected, I find out how stupid this is. The potentiometers are influecing each other, so when I lower one of the outputs by turning potentiometer, other inputs's volume's are also lowered. I tried to solve this by putting diode after each potentiometer, before the wire are joined, but this extremely lowered audio quality (the speakers were just buzzing the melody).
How to solve this? Is there any diode made for audio?
And my second problem is, I have mono wireless microphone with mono outpout (output from lm741 based preamplifier) and I want to make it stereo, but if I will connect the output to both L a R signals and joining them, as far as I know, the stereo inputs will no longer be stereo.
How to make mono signal (one input) playing on both, L a R signals, without destroying the stereo on other inputs?