I have a denon 2910 hooked to yamaha 2600 via optical and multi channel input. I have a calibration test tone disc for my rocket sub that I can't get to play. Is there anything special about the set up with the denon to play 2 channel with sub? I had to cannibalize my oppo 970 from my bedroom and hook it up through the front av inputs on the yamaha and it worked just fine.

Any suggestions? I have tried it through optical, multi channel and r/l analog with no luck from the denon. What settings do fellow 2910 owners have for 2 channel listening?

You have to set the avr to output bass from the front and subwoofer so your 2 channel mode will work with the sub,pure direct will not work with a sub since the pure direct is full analog and sends a full range signal to your 2 speakers.

That may be it. I always leave it to small and crossover at 60 or 80 Hz. But then why would the oppo work okay?

What about speaker config settings in the denon? Would that make a difference?