It has its own x-over, but I have it tuned fairly high (120 Hz, as that's the highest output by the LFE track). I'm not sure what the slope on it is.
Unfortunately, lowering the x-over to below 71 Hz is not really what I'm looking for, since I want the subwoofer to handle frequencies above 71 Hz as well. I just need to drop that one.
(My problem is a resonance curve in the room, not an overlap of speaker ranges.)
How would I notch that frequency as you describe?
The PC solution, while interesting, isn't quite so practical, as I don't have a computer in my living room. (Actually, check out the TCS at
www.tactaudio.com -- it uses a PC to calculate the calibration for the system, then it stores the configuration in the little preamp box.)
Do you know of any good low-frequency parametric EQs? The only parametric EQ I found was 3-band, but the 3 bands were restricted to low, medium, and high frequencies respectively. I'd love a 3-band low-frequency parametric EQ. (There's actually another harmonic I'd like to diminish around 45 Hz.)