bluesfan,
Well ours gets so hot that we have to turn the heating off and open the windows. Then to make matters worse the fan kicks in and then we have to turn the volume up

Seriously though
As hornydragon says make sure you have a well ventilated cabinet.
Mine gets a little hot but it's in a smallish cabinet with a DVD player on top, I took the back panel off on my cabinet so that air can circulate around it properly.
HK have designed the amps with this in mind (theyre quite clever) when they get hot the fan switches on replacing hot air with the cool just need to make sure adequate ventilation.
Any high current amp is subject to getting hot.... That's just one of the signs of a descent amp. As long as the Manufactures have provided adequate cooling they'll be fine.
How many threads do you see saying "Help Amp Blown Due to OverHeating"
I think mine consumes about 70watts when it's idle..
hence a big lecture

for my missus if she leaves it on unused. I'm not sure how much it consumes when in action but i'm sure it's no where near the maximum value.
If your worried about power consumption I suggest you buy some energy saving lights bulbs in addition to your HK...
