Have a sub on loan with no manual. Would appreciate any advice/info regarding the proper settings for the sub on a 2-channel system using a pair of M-60's. I would like the 60's to continue to run full-range. I am running the sub out of a pre-out on my amp, into the line-inputs on the sub. The settings in question are as follows:

Line Input: Normal or LFE?
Phase: 0 or 180 degrees? (the sub is placed in left-corner of my room beside one of the M-60's)
Frequency Cross-Over: Dial runs from 50 to 150Hz?

I believe the freqeuncy response of this sub is rated 40 to 150 Hz? Is this an appropriate sub to use with M-60's...is the low-end low enough to enhance or add bass beyond what the 60's can reproduce on their own?
Thanks!

Joe