Hello,
Have a really nice NHT X1 active crossover I don't need, as I use a DEQX processor for active crossover duties. This is designed to blend a stereo pair of subwoofers (/bass bins) to the main speakers. Has 12db/octave slopes, a continuously adjustable low-pass between 50 - 140 Hz., and fixed 50/80/110 Hz. high pass filters, which pretty much covers all the bases. It also has a really nice "Boundary EQ" feature to compensate for how close the speakers are to the wall... kind of like baffle-step. Has both RCA and XLR inputs/outputs, adjustable 0/10 db gain (makes it easier to mate with different amplifiers). Turns on via either power switch, 12V trigger, or audio-sense. All in all, a well-engineered product.
PDF specs from manufacturer:
http://www.nhthifi.com/site/pdf/NHT-X1.pdfcheers,
-Tal
