Does your receiver have test tones/pink noise, where you adjust the dB level of each speaker and the sub to be the same? I assume you would have to do this by ear, if you don't have an SPL meter.

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