Is the 990 set to upsample 2.1 for the CD input? If it is set to stereo output it might not use the sub especially if your speakers are set to large.
Interesting. It was set to PIIMusic. I set it to upsample and noticed an improvement in the sound but still no punch but afterwards I could not change it away from upsample. I had to change the input to analog, then switched the sound to 5 channel stereo, then set it back to optical 5.
I think 5 channel stereo is giving the punch I was looking for. Also, my front left/right are Polk Monitor Series towers but for whatever reason they just seem to be missing some bass that I can hear with the subwoofer for music anyway.
Thanks for the help.
