Reciever keeps shutting down at loud volumes (but I'm using monoblocks)

Hey guys, first of all this is what I have:
Onkyo SR702 reciever
Titanic 15" sub
Polk RTI-12 left/right speakers (got these because I wasn't getting the tight bass that I wanted when listening to music)
2 Outlaw 2200 monoblock amps powering my RTI 12s
4 Polk surrounds

Richard Thompson visiting the wasteland.

Yeah, the title is a James McMurtry joke, but I digress.

Richard Thompson is coming to the cosmopolitan burg of Chico, CA on December 9th and is playing an intimate venue.

We have a good brewery here, and the owner likes live music, so, good for us.

The place holds 350 people, so, either we are in luck, or Mr. Thompson is really down on his.

They even list the showroom's specs:

Sierra Nevada Brewery Hi Fi Showroom

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