Niles is probably one of the better ones. They have them with and without gain control. You should get ones with protection for low impedance if you are connecting all 6 pairs to one (or even 2) amps.
Good speaker selector box
I recently moved to a home with 6 pairs of in wall speakers. Of course I now need a speaker selector box. How important is it to get a box that does impedance matching and has volume controls for each channel? Any advice on this issue I know nothing about is appreciated? Any recommended models?
Jack
Jack