RUSSOUND SDB 4.1 Dual Source Speaker Selectors w/ Volume Control 4 Speaker Pairs

READ! Russound CAA66 Multizone 6-Source 6-Zone Controller Amplifier (POWERS ON)

RUSSOUND CAS44 Multizone Controller And Amplifier - For Parts/Repair

Russound CA4.4i 4 zone - Multi Zone Amplifier 4 Source Central Controller/ Amp

Bose Lifestyle Stereo Amplifier 2-Channel, Bose Model M1 Multi-room interface

Triad 8 source 8 zone audio matrix switch v2 TS-AMS8-V2

Russound CA 4.4pi Central Controller/Amplifier for 4 Zone/4 Source Systems

Leviton AE6MC Architectural Edition, 7 Source/6 Room Multi-Channel Amplifier