i got a question for the d310 owners here.....i just picked this unit up at a great price and am very impressed with it so far. my question is.....there are so many adjustments on here, if i just wanna demo my sub(since its for sale) how do i set this thing up for more bass? it seems like i have no real bass now, whereas my previous unit was easier to setup for just bass. what are some general settings i should be looking at or tweaking? thanks for any input or direction...