Since both the transmitter and receiver of the Rocketfish "wireless" system require power, all you need is a plain old speaker out (Red/Black) for each channel (Left/Right). The power rating of the amp/stereo is of no significance in this case. The volume of the speakers attached to the Rocketfish "wireless" system will correspond directly to the volume on your amp/stereo. There is a volume control on the receiver as well. Keep in mind you still need actual speaker wires to connect the speakers to the wireless receiver. The utility of a "wireless" speaker system like this is to avoid running wires from your amp to the back of the room.