I just got my 20-39 where it sounds the best. I'm going to let it go that way for a while, but I am always looking forward to that next tweak. Just wondering how many people out there EQ theirs. I haven't got any obvious peaks so far, but I can see that if I had to keep it in it's original spot, I would have a bad hump around 50-60 Hz or so. Besides, $99 for another box on the rack ain't bad.