Eventually I will be switching to a preamp and amp combo, and the preamp I'm looking at (NAD S100) does not have any sort of subwoofer preout. In order to run a sub, I have to run the full range signal into a subwoofer crossover unit, like this one ... Specifications Description: Bass Manager/Active crossover for use with Evolution U1, U2 subwoofers and T5, T6 tower systems. Controls/Features: Power, master gain, LFE gain, boundary compensation, stereo/mono switch, phase, hi & lo pass filters, 12V/Audio trigger, 115v/230v switchable, rack mount kit (optional). Switchable Hi Pass: 50Hz, 80Hz, 110Hz. Variable Lo Pass: 50Hz - 140Hz. Phase Selector: 0/180 degree switch, 0-90 degree variable. Gain: +10dB, 0dB selectable. S/N Ratio: >100dB. Input Connectors: XLR, RCA. Output Connectors: XLR, RCA. ... in order to block low bass from the mains before the signal reaches the amp. Will there be a degredation in sound quality if I do this? If so, does anyone have a better idea for integrating a sub into the setup? I gotta have my bass.