Originally Posted by NathanSang
So far this is my understanding of this bass management thingy. Please correct me if i'm wrong.
1. For "full range" speakers, on the XA2 set everything to large and on the AVR boost the sub to +10.
2. If you have small speakers, on the XA2 set everything to small, reduce the speaker levels to -5 but leave the sub level at 0, and boost the sub to +10 on the AVR.
That will work. Better still, use a +15dB boost at the AVR and leave the XA2 settings at 0.
3. What's the "correct" settings for large powered fronts but small surrounds?
I don't have a great answer for you on this one. I am in this situation - my surrounds aren't tiny, but they really aren't a true full-range design. I would expect this to be pretty common for someone who has a great 2-channel music system, then added center and surrounds for watching movies.
Unfortunately, when I measured this configuration with only the center and surrounds set to 'SMALL' and the L/R fronts set to 'LARGE', my results were (see attached graph):
> LFE/sub was down about 10 dB (should be 11 dB).
> Mains were at the correct level.
> Surround channels were down a hair over 1 dB (should be no change).
Problem: The relative levels between mains and surrounds were now messed up. You could calibrate this out using the XA2 level settings, but I tend to think that if this is wrong, there may be other problems as well.
Bottom line: the levels are correct if you set all of the speakers to LARGE or all to SMALL. Mixed systems behave strangely. You can probably get it to work, but you might mess up your level balance for other sources.......