MA5300 integrated amp.

Any amp in a cabinet is going to run hotter than one out in open air. I have been known to take the backs off and leave the doors open when amps are placed in that type of furniture. 

The backs on the cabinet are removed. The heat sinks on the Mac5300 are at the sides and there will be 1/2 inch of clearance on each side. I have read that the MA5300 runs pretty cool, unlike the Musical fidelity 5si and 6si. These are others I have considered.

My MA6600  does not get hot at the volume levels I listen to.   When I had a Krell FOB 200 I used some small usb fans to cool them.

Page 6 from the MA5300 integrated Owners Manual suggests: "Allow at least 6 inches (15.24cm) above the top, 2 inches (5.08cm) below the bottom and 2 inches (5.1cm) on each side of the Integrated Amplifier, so that air- flow is not obstructed."