Niles ZR-6 Multizone Amp (for parts, see photo, burned inductor.)

Niles GXR2 12 Channel Amplifier 6 zone Moular Multizone Amplifier | tested works

Niles Gxr2 Multizone Amplifier

Crestron Adagio Audio Expander Multi Room Amplifier 12 Zone Whole Home System

Niles GXR2 Modular Multi-Zone Receiver W/ 1x: TM-AM/FM 1x: IM AUDIO 1x: IM -iPOD

Episode Digital Amplifier with 45 Watts x 12 Channels EA-AMP-12D-45A TESTED!

Elan EL-IPD-AMP-EXT Multi Zone Audio Extender

Russound A-BUS A-C68 Multizone Controller (For Parts)