Monoprice 10761 6-Zone Home Audio Multizone Controller Amplifier Kit Open Box

6 Channel Multi Zone Audio Controller

100W~500W Upgraded Single Channel Audio Power Amplifier 1943+5200 High Power

OSD Audio XMP100 Amplifier

Sonos ZonePlayer 120 Digital Amplifier 2-Channel Home Audio White/Gray

Sonance C4630 6-Zone / 4-Source Multi-Channel Audio Distribution Amplifier

Russound R1250MC 12 Channel Power Amplifier for Multi-Room 6 Zone Audio System

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