I own the Kenwood 6070 and don't understand what the BASS PEAK feature does. Can anyone please explain what this feature does. The manual is no help at all! It allows me to change the level from -30 to zero and I can also turn it off. I'm currently using JBL bookshelf speakers for my fronts and the SONY WM-40 sub(modded). Any suggestions on what I should have this set to? Thanks in advance for any replies.