Want to bump this thread so maybe a firmware fix will come....sometime....

My further observations on this...

The bass management does not work correctly in "bypass". Bypass and Upsample control the sub the same way, no differnce in level or sound.

I have to set my sub channel level to -5db for any surroound modes (including 7-channel stereo) or it bottoms out. In bypass, stereo, or upsample it sounds best at +5db.

That's a 10db swing. Luckily I have a small LCD display for the OSD so I just crank the sub up to listen to music. Annoying, but it works.

I agree that allowing the 2ch sub offset to boost would fix this......Outlaws are you listening????