Why limit your listening to one room? With the ABH 4, no room in the house need be without music, no matter which AVR is in use. For existing systems linked to A-BUS/READY products, the ABH 4 allows you to power up to four rooms, or even more with additional ABH 4 hubs. For systems without an A-BUS/READY jack, the ABH 4`s onboard audio inputs add the simplicity of A-BUS to any multichannel or stereo receiver with a `Tape` or `Multiroom` output; you can even use it directly with a CD or DVD player or outboard tuner to bring music to any room. Harman Kardon makes it easy to enjoy your favorites in almost any room in the house. All 7.1-channel Harman Kardon receivers (except theAVR 240) include a second-zone control system and remote control, complete with assignable rear-channel amps, making it easy to power a second room without an additional amplifier.