My 7500 runs very cool,but my speakers are very efficent.At -20 on the 990 it's rockin the room on movies and hardly working the amp by it's heat output.On 5 channel music it will get a little warmer but no more than any other amp on the market.
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Outlaw 990\7500|Klipsch RF-7 mains|Klipsch RC-7 center|Klipsch RF-3 rear|Velodyne ULD-II 15" Sub|Paradigm Seismic 12 Sub|Sony VPL-HS20 front projector|110"16:9 Stewart Firehawk |MX-700 remote

My Theater:
http://taz.smugmug.com/gallery/426426