As long as you have that air space around the sides and front of the amp you ought to be ok. Many years ago I put a pair of Krell MDA300 monoblocks INSIDE of a closed (custom built) cabinet that had absolutely no ventilation whatsoever. Couldn't run the system with the doors closed for obvious reasons. Checked the internal temp once with a digital thermometer- 180 degrees! Crazy. Stupid. Then I discovered a company in California, ATM, or Active Thermal Management. Bought a complete ventilation system with attic mounted "hush" fan, ducting, variable speed control, louvered intake vents. All for about $500. Literally lowered the internal cabinet temp. by 80 degrees. Well worth the money. ATM makes many different types and styles of ventilation and/or heat exhaust systems, even "free standing" fan contraptions with sensors. I even have one of their 2 fan setups sitting on top of my DAC blowing fresh air into the vent cutouts on the chassis. Been a while since I did business with them but check them out. I think they still exist. Good luck.
