>>Running it, I actually found one of my speakers out of phase... (How embarassing!)

Hey, that's why the tests are there. Glad you found it.

Did you notice a difference after fixing the phase ?

M60ti, VP180, QS8, M2ti, EP500, PC-Plus 20-39
M5HP, M40ti, Sierra-1
LFR1100 active, ADA1500-4 and -8