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

Sonance Sonamp ASAP2 SAT Stereo Power Amplifier Rack Mount Multi-Room Audio Amp

Russound CA 4.4pi 4-Zone 4-Source Controller/Amplifier

Sonance 12-50 Multichannel, Multi zone, 6 Rooms Digital Amplifier.

Work Pro PA 4150L Multichannel Power Amplifier 4 Channels 70-100V 600W Mountable

AudioControl The Architect 700 Multi-Zone Power Amplifier / Speaker Optimizer

Rare Conrad Johnson MET-1 Pre-Amplifier Multichannel Tube Pre-Amp Bundle Remote

Harman Kardon PA2000 Bridgeable Multichannel Amplifier