Basic Subwoofer Advice

[dborgill]

Greetings,

I have quite the hodgepodge of a system but am loving it. I will ask my question and then list my equipment below for reference.

I am having a tough time getting my sub to sound right. It either sounds too "rumbly", "too powerful" or "too weak". Can't seem to get the right middle ground. It's pointing a the corner of a room FYI. I used my MRAC mic to auto calibrate my receiver. It put the crossover at 100hz and I set my subwoofer to 100hz also. But there is also a phase button on the sub (Normal/Reverse) what should I set that to? Also, is it better to have the Sub higher on the receiver or the level on the sub itself turned up higher?

JVC HTIB Speakers
Sony 10" Sub
Sony A3000 55" 1080p
Marantz SR-4003 Receiver