Zone 2 Line Out: By using the Zone 2 line-level outputs on the TX-NR509, you can connect an external receiver or integrated amplifier in a second room, allowing you to listen to 5.1ch surround in the main room and 2ch stereo of a different audio source in another room of your home. The volume of Zone 2 is controlled by your optional integrated amp.
Incompatible Zone Sources: Optical/coaxial digital and HDMI audio sources are not output to Zone 2. You cannot output any video signal to Zone 2.
从这里看来，就算是你加一个Pre amp, 仍然看不了HDMI输入的电影。
我那个是609，好像zone 2可以收任何与zone 1相同的sources.