Dgaarretson, I am running RCA outs from my pre into the RCA inputs on the Sub. (I'm running balanced from the other pre outs to my amp, which is then powering my speakers--full range).
This is an excellent way to go unless one has a high-quality full-function outboard crossover to perform high-pass hand-off to main speakers. Mediocre electronics of high-pass crossovers typically found inside sub cabinet are likely to degrade sound and cause more problems than are solved. You might first try the low 40hz point with a sharp 24db/octave roll-off. After you have experienced how clean things sound up into the mid-bass and mid-range, experiment with more gradual roll-off and higher crossover points for comparison. I bet you will find roll-off at higher frequencies is muddy.
As far as polarity goes it's 0 or 180 according to the room. Have someone switch the polarity while you listen to a song with constant bass and choose the polarity based on which one has the most sound pressure. The loudest pressure is the correct phase.
I have set it to about 50-55 on the low end, althoug it's tought to tell with the rotary dial and now the volume is at about 2 o'clock. Seems to been pretty decent. i get some nice low end extention, where the speaks drop off.
Worth nothing, the speakers are ACOUSTIC SUSPENSION (no ports)
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