How to integrate phase of a subwoofer with mains?

Start with a test tone that is below your crossover point of your mains. Set the volume to a comfortable level. Using a SPL meter at the seating position, adjust the phase of your sub that produces the highest output...you're done. Now comes the fun part of sub positioning, crossover points and volume. Good luck, and have some fun.

Ryder, using a standardized sub set up, you are attempting to equalize the output amongst the various frequencies, thus attempting to eliminate any frequency nulls and peaks. With a neutral setting i.e. flat response, you now can hear what the recording engineer wanted you to hear.

Adjusting the sub by ear and further adjusting the output based on specific CDs is basically over riding the recording engineer’s efforts and tailoring the sound to your particular taste. Nothing wrong with this approach, but it is a colored approach. Even at fine restaurants I sometimes find the need for more salt.