Yamaha Multi-Room Amplifier (xdaamp5400rk)

XDA-AMP5400RK Multi-Room Amplifier (4 Zone, 8 Channel)Works together with Yamaha XDA-QS5400RK to expand speaker coverage in custom integrated multi-room audio systemsEight channels of audiophile-grade Class D amplification, bridgeable and 4-ohm capable, featuring a unique ground loop/hum-free circuit designFour audio b