OK, I'm doing my research and saving now for an eventual subwoofer upgrade around Christmas time and have really focused in on the ACI Titan II LE. Not only is this a truly beautiful looking sub that would mirror the aesthetics of my Paradigm Ref 40's and 20's, but I use my HT for about 85% music, 15% HT, and the ACI is suppose to be eminently musical because of it's sealed design. I'm not one for huge output levels anyway and my puny Mirage BPS-100 has a musicality I don't want to lose, but I want to gain the extra 10 low hertz I'm missing right now. But I have some questions. 1) The ACI has two lowpass filters (A&B). Can someone tell me how these work? If I wanted to crossover my Paradigm's at 60htz, would I set both the A and B filter to 65? Would I only need to set one filter? For someone who has a sub with only one crossover, this is confusing. Plus, I disable mine because I do all crossover adjustments in my Anthem AVM-20. 2) It says on the website that you can use the theater direct input which will disable the volume control. Does this mean that if you use this input basically the gain on the amp is turned all the way up and you have to regulate the integration of sub and speakers via the processor alone? 3) My current sub has no phase control. Can someone tell me what the purpose of this is and how it's used correctly for an ignoramus? Thanks. I have heard nothing but good things about this sub, but want to make sure it fits my needs first before I make some kind of committment.