Yamaha XDA-AMP5400RK

Specially designed for custom integration of whole home audio systems, the “AMP” serves as a companion amplifier for the Yamaha XDA-QS5400RK to expand speaker coverage and/or increase power output. It may also be used to expand secondary zone speaker coverage for Yamaha AV receivers that have Zone pre outs.

• Works together with Yamaha XDA-QS5400RK to expand speaker coverage in custom integrated multi-room audio systems
• Eight channels of audiophile-grade Class D amplification, bridgeable and 4-ohm capable, featuring a unique ground loop/hum-free circuit design
• Four audio buses and included jumpers allow for wide variety of speaker configurations
• Interlocks power on/off with XDA-QS5400RK via Trigger I/O
• Integration-friendly features include audio sensing inputs, IR I/O and more
• 1U high, rack-wide enclosure; removable rack ears and faceplate included

More information on the manufacturer's website.