Best way to use the equalizer is to set your highest levels at the output level (flat) and reduce those frequency bands you want to be lower than the highest. The equalizer is not a good amplifier.

Those are some pretty weird output readings in that neither phase setting gives you the highest SPL output at all frequencies. If you want more bass and your sub has a +3db setting, I'd try that.

Enjoy the Music. Trust your ears. Laugh at Folks Who Claim to Know it All.