I'm not cagey at all. I use racks and so the fronts are just spacers. Wide open at sides and backs.
Also I use pre/pros and NOT receivers, they only draw 60 watts and run cool. There is barely even detectable warmth on the case.
The power amps are below an extractor fan duct. The actual motor is a long way off. The fan speed can be adjusted and the motor is a long way from the inlet duct for noise reasons.
I do not have over heating issues. That studio is dismantled and in the new one under construction pro Mid Atlantic racks will be installed.
Front.
Rear
Power amp case, showing ceiling extractor duct, power amp relays and fan control. The fan comes on with the left and right main power amps.
