Russound also makes a similar types of amps that does the same job.

[Link: russound.com]

Different music, in different rooms, for different people, sounds difficult? Not if you consider Russound Multi-Source / Multi-Zone products. The most flexible custom installations control a centrally located A/V system from other rooms in the home or office. At the very least, this includes the ability to select and distribute music from an audio source to any room in the house simultaneously and independently. Russound builds several Multi-Source / Multi-Zone products for all types of needs and price ranges. From the simple to complex, Russound provides a system for enhancing every lifestyle