Phil, my reference song for gauging peaks cleanly is Renee Olstead's Hit the Road Jack.
With that tune, four M5s in twin-parallel configuration as described above, crossed at 80Hz to my 800v4, I measure 111.5 dBC peaks at 13 feet away in my 4,200 cu. ft. room before the ADA-1500 throws in the towel.
In 5.1 PLII music, with the 160v4 powered by the third channel of the ADA-1500 and 2xQS10 powered by the Onk, I measure 112 clean dB.
This may sound like it's loud, and it is, but it's not ridiculous due to the nature of the song. I'd love to hear those peaks at 120dB.
Anyone reading this, I highlight the following: 111.5 clean dBC at 13 feet away, with amazing fidelity and holographic soundstage, for under $US7K! If I was the competition, I'd be quaking in my boots.
