Hi, I just received a used TC Sounds 3000 DVC 15" sub with the black cone. Bought it from this guy at Ebay (he bought the sub on may 2007), and looks to be in great shape. It cost me $300, including shipping. I plan to install this sub on a 3.75cf wood ply sealed enclousure this coming saturday. It will be powered by a Lt1300 plate amp and ED EQ2, hope to have pics soon. Looking around I found this old TC Sounds site with the specs for this driver; Qms 7.30, Res 4.24, BL 22.60, Mms 365, cms 140, sd 0.0820, vas 131L, fs 22, Qes 0.42, Qts 0.40, spl 87.18, 2000 watts rms, no xmax found. From some of the readings I've done on this sub it is supposed to be high inductance, sometimes has a hump around 50-55hz and has a frequency dropp off after 70-80hz. Could this be the specs of my driver? This driver is supposed to have a high BL, but it is not showing it here, is this good or bad? Also, I've read that this driver is suppose to be really good at low bass but not so good at higher bass. I plan to crossover my speakers at 80hz but would be nice to have a crossover option of 90hz or 100hz. For comparison purpose, I also found this TC Sounds 3000 "QVC" 15" sub with the titanium cone specs; Qts 0.30, Qes 0.32, Qms 6.10, Fs 22, Res 4.63, Ls 9.2, BL 27.1 (quite a bit higher), spl 88.6, cms 140, mms 373, vas 146, xmax 30mm and 2000 watts rms. I thought the only difference with the QVC was the wiring options. Finally, just to compare, here are the Audiopulse Axis 15" sub specs; Qts .40, Re 4.7, Fs 22, cms 135, vas 126L, mms 390g, BL 26.2, Sd 0.082spl 87.4, xmax 30mm and 2500 watts rms (more power handling capability). I thought all these subs parameters were closer to each other than what I found. Any thoughts are appreciated.