You only need impedance matching in one place. When using a speaker selector, that`s your impedance matching device. You then just use standard volume controls.
> Name :
> Message :
> I would like to use a 6 pair speaker selector with impedance matching volume controls. Additionally, I would like to have a volume control in one of my rooms.
> Will the addition of the room volume control have any impact on the impedance of the system? Thanks for you help.