Quote:
This would means I'd have to connect the two Stereo RCA outs from the Oppo to the CD RCA inputs on the 990 (for use when playing CDs), and the 5.1 RCA outs from the Oppo to the 990 (for movies/multichannel).


Basically, that's what I did with my 990/7500, i.e., I used 7.1 Direct out from my Oppo 103 to 990 7.1 Direct In; I set that up as my Video Input for SACD's/BluRay in the 990 (I would choose 7.1 Direct on 990 remote, for 7.2 playback, etc.). Then I connected either coax or optical output from the Oppo to 990 coax/optical input and set that up as an Audio Input for 990 2 channel playback....
As you pointed out, I set all speakers as large in the Oppo Speaker Configuration menu so that the 990 would do bass management.
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Anthem MRX-500/ Outlaw 7500, Paradigm Studio 100's Fronts, Paradigm CC-590 Center, Phase Technology Dipole rears , Martin Logan Dynamo sub, Oppo BDP-103, DIRECTV H22-200 DVR HD receiver, Samsung PN60E8000 3D Plasma 60"
2nd System
B&K ST 202 Amp, Outlaw 990, Rotel RCD 1072CD, Yaqin CD 1 Tube Buffer, Apogee Centaur Minors, Phase Technology Model 10 Sub, Rotel RP-855 turntable, Panasonic DMP-BD30, DIRECTV H21-700 DVR HD receiver, Free Agent Home Theatre+, Vizio 40" LED