I'm hoping someone here might be able to help me out a little with this
project I'm working on. I have a Left and Right RCA Audio output that's fed
directly into a speaker amp, unfortunately, the speaker amp does not have
volume control. I'm hoping I could build something to go between the output
and input to control the volume. Is it simply a matter of just inserting a
variable resister (potentiometer)? Is that all there is to controlling
volume on an RCA audio signal? If so, what are the ohm ranges? Obviously 0
ohms for full volume, but how many do I need to make it silent? Also should
I use a linear pot or logarithmic pot?

Or, if something like this already exists (and has a remote control to
control the volume), please let me know, cause I'll just buy it instead of
making it.

Thanks,
Harry