First of all: This is almost the only Receiver, which is not so deep that it fits more in any normal TV cabinet. I put it together with Harman Kardon HKTS 16 5.1 A at a Samsung PS64F8590 and a Mede8er MED1000X3D. Since I am dependent on the headset support, I was looking for a Reciever that both can simultaneously; Speaker output and KH. This is only possible through the second zone. However, the X2000 only supports analog resources he 2nd zone. Although the X3000 also supports digital sources - then makes but a downsizing at the Zone 1. That one hears with KH in Zone 2 the same source as Zone 1, the sound system "only" stereo does not come to bear due. The X4000 remains silent on Zone 2, when digital 5.1 sources are selected. That fact can only be working with D / A converter and return the digital sound of Zone 2 on Stereo. Then also reaches the X2000. Why the KH support is neglected by the major manufacturers like Denon, Yamaha, Marantz Pioneer or so, I do not understand. Just Onkyo I have seen a Reciever that could be used with KH and 5.1 speaker system at the same honest - but it cost 2000 EUR, and the device is as gigantic that it nowhere reinpasst. My goal so I have the X2000 achieved so far at the end of mi: built-up Receiver and affordable.