Just been testing my new sub, and I get a reasonably flat graph when plotting the frequency, it drops off to around -5db at 20Hz. However I get a lovely +12 db around 50Hz, this is just were I want the sub to start coming in to cover the mains. It appears to be because of the room, I get the same peak, with just the mains (+9db) on their own or just the sub on it's own, and both together is just ridiculous. I've tried moving the sub, but this doesn't help, tried drawing the curtains and it's pretty constant +12db wherever I move in the room. Any ideas of a cheapish, easy fix to this problem, and moving house is definatley out of the question. Cheers Slingshot If it makes any difference the room is approx 13' X 24' and it's stud and plasterboard.