Is this enough air for my Denon 3808CI? We recently bought this tv cabinet and I have never had to have my amp in a enclosed space. There is a couple of inches above the receiver. It's more than what it looks like because there is an extra piece of wood right in front. Just a hole in the back for cables. I'm new to the forum, thanks for your help. I love this receiver, sure don't want it overheating!!