sub integration merlin tsm mme

I had an audiophile friend come over and while we were listening, we made some sub crossover adjustments that. I have an old Rel Strata III sub and was crossing over at abot 26hz and had the sub volume at about 10 and 11 o'clock. My friend said why don't we play around with the sub integration and see what happens. He listened while I adjusted. Well, we ended up between 47 and 49hz leaning towards 49hz and volume between 8 and 9 o'clock and also reversed the phase. To my ears it is much better this way. Music has more body, soundstage, depth, and the subtle nuances are more pronounced in a good way. Sometimes is it better to have 2 pair of ears as opposed to just 1 pair. Curious to where others have the crossover set. My room is 16X19X8. He said many make the mistake of having the sub crossover set to low. He felt that the rel is a great match with the TSM, very seemless and quick to keep up with the tsm's