Yes... some hotter than others. It is always good to have some ventilation. I have three small super quiet computer fans installed in the top of my cabinet pulling air over the equipment from the front.
i dont know about cutting into the avr but check this out.I have a question, could ya place 2 fans on a AVR, like cut holes for the fan to be mounted one entering cool air and one exiting for pushing the air out.
So one blowing in, the other out to create a jet of air through it to cool it?
WOuld ya guys recommend against it for any reason?
the wood panel is pretty solid an about an 1/8" thickI understand the desire for the perfectly smooth hole to mount the fans, but consider that this will be in the back, where you will be the only one to ever see it.
How thick is the wood in back? If it's very thin, you may be able to use a carpet/utility knife to cut it, just score it in the shape you want, and then continue to cut deeper until you go through. As with any cutting tool, let it do the work, using more muscle leads to cutting something you didn't want to cut.
One of those fans will move more than enough air. All you're really trying to do is keep the air circulating, not create a wind tunnel. Any of the kits should work fine.