Chap's. I'd like some advice on my response curve for my REL Q400. REL calibrated @ 25hz approx 70db. Tag set, speakers to small crossover to 80hz. Freq' resolution approx 4hz steps. As you can see not exactly ruler flat, Behringer required? The sub is sited to a side wall, just past the seating position to the front firing across the room. Room dimensions are 18x12x7ft approx, front of cinema from floor to ceiling has extra thick curtains (the type that used to be in old type cinemas) ceiling is suspended with 15mm armstrong "Tatra" tiles. When i built the place i was advised by an acoustic engineer to try and adhere to the LEDE priciple (live end, dead end) & not to over deaden the room ETC ETC BLAH BLAH I've never been really happy with the bass performance. Any advice app'd Tim.