Originally Posted by Tim Hess
I'll echo this statement.
I've been running my 6-8 non-stop since it was delivered, movies, games, music, etc. It's in an enclosed cabinet (Front door shut) though the back is open, it sits on a vented shelf with 4" clearance on each side and easily 8-9" for the top.
I can't hear the fan and it's never hot. I've felt it to be warmer than cool
but that's with no AC on and it running for hours on end.
You have reasonable clearance allowing for airflow. I do too. I can't hear the fan from viewing distance either and the heat is not bothering me. I hope that is clear to everyone.
But let's do a little math.
Onkyo 608 - 100 watts output, drawing 693 watts.
Pioneer 1020 - 80 watts output, drawing 240 watts.
Those numbers are from the official specs and output is measured to the same FTC standard (continuous, same distortion, frequent range, same output impedance). Let's equalize the draw per output, by multiplying 693x0.80 = 554.4 watts.
That is still 314.4 watts more than pioneer and more than the entire pioneer's draw. Where does that power go? It has to go somewhere, if you remember your physics class. If it does not go to the output, it can only go one place - HEAT. That is why Onkyo needs a fan.
So happy owners of 608 can continue saying what they say, but I suggest you buy pioneer, put them side by side and touch the top panel at the front after some usage. That is what I did, and that what has changed my perception of "hot". It might just change yours too. Onkyo appears to spend more energy on heating than Pioneer does on actually doing the amplification.
I am done talking here. Onkyo goes back.