Peter, did you also try the Onkyo at the 8 Ohm setting?

I would be curious if, under the same approximate volume levels that you were using the other night, if you ran a test whereby you switched back and forth between the 6 Ohm setting and the 8 Ohm setting, you would find a difference.... i.e., a clipping problem.

I don't "do" AVS, so I'm not sure what was talked about over there, but here the concensus has always been to leave anything and everything in the 8 Ohm position so as to not limit the output capability.

Any chance that what you were somewhat describing as a crescendo simply drove the Onkyo into clipping?

::::::: No disrespect to Axiom, but my favorite woofer is my yellow lab :::::::