Originally Posted by hifi59
It feels just as hot as the 2700 did. I have mine on a shelve with a glass door. Have'nt had any shutdowns ,even at high volumes.
FWIW... I've got my 1800 in a homebrew rack -- no front, but less than an inch of side/top clearance. The back panel of the receiver "slot" has two fans that I run at pretty low speed just to circulate some air. A temp sensor sits on top of the 1800 that speeds the fans up a bit as things get warmer (also homebrew).
I bought a cheap indoor/outdoor digital thermometer (you can get these at any Walmart / Target / home improvement place for under $10) and put the outdoor probe on top of the receiver.
So far, the highest temperature I've seen is about 110 degrees F, and the 1800 handles it with no problem at all. Running it at high volume doesn't appear to have a big effect, but maybe it would if you ran it loud all day. The receiver does run "warm" just being powered up. I don't imagine the 3800 is any different.
The manual says:
Install this sound system in a well ventilated, cool, dry, clean place - away from direct sunlight, heat sources, vibration, dust, moisture, and/or cold. Allow ventilation space of at least 30cm on the top, 20 cm on the left and right and 20cm on the back of this unit.
20cm is almost 8 inches, and 30cm is almost a foot, so any kind of enclosed space will require special considerations for ventilation, if one believes Yamaha.
Just some thoughts... If you're concerned about the temperature, "invest" in the cheapie thermometer and keep an eye on it. I have no idea what the upper limit might be (and don't really want to test it), but I've had zero problems at 110F.