@PENG - I spent half the day trying different modes with the 4700. Setting up a 7.1.4 setup does NOT fix the issue. It does allow you to use preouts with fronts but if you move to preamp "amp assign" then you have to rerun Audyssey all over again or Audyssey EQ does not work, Dynamic EQ is off and the Audyssey menu is greyed out.\n\nBasically, it's a hot mess. If you want to change amp assign settings "on the fly" it's not possible with the 4700 without getting the mic out and setting up Audyssey from scratch again. :p\n\n\nThank you for the information. Can't assume anything these days.. As far as I know, users of the 4500 has not complained about this issue. Someone should email Denon and request this addressed via FW update. My guess is, they think since you got the preamp mode, you should be messing around with the assign thing, forgetting that many of us want the flexibility to use some of the AVR's power amps and still want clean output at higher output voltage for the two mains.