Tuning Rel G1


I just bought REL G1 Sub-woofer, which I connected with Krell S1500 Power Amp. I am using High Level Input with Synergistic Research Tungsten cable to connect. Speakers used are B&W 802D's. I went through REL manual 4 or 5 times, and followed the directions to set it right.
Problem is I tried crossover frequency from 32HZ to 40HZ, but I cannot have a volume opened more than 6 or 7. I spoke to several people and there recommended volume level is 14 or 15. If I set the volume level on sub-woofer to 14 or 15 my apartment shakes and base is extremely high.

Any advise?
trcns
Volume level should not be relevant. Worry about setting it at a level that you don't notice any "extra" bass. If 6 or 7 works, who cares what others are doing.
Just read the specs on the 802 Diamond
34hz - 28khz +/- 6db
27hz at -6db
I would set the crossover closer to 27hz and go from there
Right now crossover is at 35 db. And volume level is 6. Some tracks have decent bass but other are full of base. Which make me either skip these tracks or I have to lower the base, I do not want to adjust the base for every other track.