I used my HK AVR-525 for the first time today. The fan came on a LOT. I'm only using a 5.1 setup at the moment, and all speakers are 8 ohm. I was running at a volume level that my Onkyo SR500 had no problems with. The receiver is out in the open, sitting on a table. It is not particularly hot in the room. So about the fan... do you other AVR525 owners experience a lot of fan activity even at low volumes with friendly speakers? Thanks for your feedback!!