garcianc2003, yeah I check this forum fairly regularly, I don't always sign in though, got to keep up with when the pre's are coming out. and yes it took a good bit of tinkering to get where it is now.

gonk, my mains are set 80hz, I thought the null I was getting was a phase issue with the sub and mains, but no matter where I set x-overs the null always stayed around the same spot. I adjusted the phase some, and it helped alittle but the only way I could get to really flatten out was to raise the lowpass filter to 120hz. Any more set up tip would be greatly appreciated.