The 976 has the 7.1 analog inputs just like the 990, so yes you can run your Oppo direct into the 976.
I am running my BDP-105 via HDMI for now and it sounds great that way.
I will probably try the 7.1 direct at a later date just for comparison but it was sure nice to get rid of 8 cables for sure.
Less of a rats nest back there!
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Epson 3500 3D projector
93" Carl's Place Flexiwhite DIY screen
Outlaw 976 Pre/Pro
Outlaw 7500 for LCR & L/R surrounds
1- Emotiva Mini X-A100 for rear surrounds
2- Outlaw LFM-1 EX subs
Oppo BDP-105 Blu-ray/DVD/SACD player
Outlaw LCR (Snell Labs) for center channel duty
Tekton Lore monitors L/R
4- Emotiva ERD-1s surround speakers
Monster HTS3600MKII power center