some of the newer receivers let you setup each sub individually, which would be nice. I usually turn one sub off, calibrate the other, then turn the other one off, calibrate the 1st, then turn them both on and rock the house.

M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85