limiter? The 600 is able to hit 122dB's without distortion because of the DSP chips management. I highly doubt either of you have exceeded these limits. I know in my 8,000 cubic ft room I have not.

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