I suspect this is something I need to do. With the PSB sub there was a blatant mid-bass boost which was much reduced with the SVS in the same location. It might be a result of the SVS ports being a few feet off the ground and not exciting the room modes as much.

When the mid-bass was reduced so much I stopped thinking about placement problems but maybe that was premature.

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