Hi Guys! I hate to make my first post a large question, but I'm having trouble tuning my system, which consists of: PSB Image series speakers (older style, not the brand new ones) Rotel RSX-1055 receiver Rotel 1040 DVD player Rotel Line Conditioner Velodyne CT100 sub TARA labs cabling (going to sell and get Signal Cable soon) The main problem is there exists a huge hole is sound levels in the 80-100Hz range, the 55-65Hz range, and below 32Hz the Velodyne can't make enough sound to show up on the SPL meter :-/. I set the crossover for the sub to 100Hz, but there is still a nice hole from 80-100. It seems neither the Velodyne nor the PSB's can produce much in that range . I also played with phase, but the Velodyne does not have variable phase, only 0 & 180, and frankly neither seem to sound worse/better during the phase tests. So, I have a couple questions about the sub: -Should I upgrade and get an SVS PCi? Are the huge bass holes the fault of the Velodyne? -When I set the bass management to match the levels of the sub to the speakers, movies seem less involving - do most of you turn the sub gain up a bit more? I don't listen at reference levels, probably closer to -15dB from reference. I have the output from the Rotel set as low as possible, which I read on here will cut down on distortion -The sub is in the back of the room and faces away from the couch (seating position), since there is no place in the front for it. Could the placement be affecting the response? If anything I would think it would sound lower, though maybe not as tight. I could also try placing it by the stairs, or get a down-firing like an SVS to diffuse the bass more. I have pictures of my setup but I can't post them since I'm a noob . Thanks for reading, I hope to contribute to the forum as I learn more!