switches 1 of 2 stereo audio devices to amplifier
and switches 2 pairs of loudspeakers Input: 2 times 2 x RCA ( for 2 Audio devices )
1 time 2 x push terminals (for loudspeaker cable
from amplifier Output: 2 x RCA jacks ( to amplifier )
2 times 2 x push terminal ( to loudspeakers )