[Eeyore]

C wrote:

Hello! I have searched the archive but can't find what I am looking for.
Similar question but mine has a little extra that I can't figure out.

I want to distribute the sound to some speakers at various location in the
house and have control of the volume locally. Using Impedance Matching
Volume Control (IMVC) seems to be the solution.

Why do you think it needs to be impedance matching ? Unless it's a valve
amplifier there's no issue about 'matching' speaker loads ( other than ensuring
the load impedance isn't too low ).

Graham