Hi, I recently picked up an old used but good condition Rythmik FV12 and I am trying to integrate it with my newer Sierra 1-V2's.

I would love any and all info related to:
1) specific info about this older sub, and what settings work best
2) recommended crossover settings
3) help with determining/setting correct phase/delay

My setup is:
Chi-fi preamp (I like seeing volume numbers since it is hard to see the amp's knob, and having bass/treble controls, though usually both set at zero) to Cambridge Audio CXA61.
FV12 Sub is front right, between center console and R speaker. Sierra are on 24" stands, 2' from front wall, and 3-4' from side walls, about 7'-6" apart, and roughly same distance to MLP.

Current setting on sub are 20hz low extension, medium damping. Level at about 10:30, crossover around 60Hz, Phase at about 8:30 (best I could do by ear). Cambridge's sub out has no crossover adjustment ability.

I do have a umik and REW, but while my neighbors tolerate my music (I listen around 60-65db typically), they complain when I do testing.

It sounds pretty good as is, but still not quite right.
FWIW, I had a newer SVS PB-1000 (non pro) down there before the Rythmik, and I can't believe how much cleaner the sound is with even an old FV12.

Anyway, thanks in advance for any advice...