Luxman 590axii ventilation

I have the L-509x which is biased to operate 6 watts (8ohm load) Class A.

I have it mounted in an open equipment rack with 4 1/4" clearance above and 4" to each side(but closed off to the left and right by flanking Sorice glass door cabinets for LPs).

As an experiment, I put a free standing dial oven thermometer over the right side vents, middle from front to back.

After playing the unit for 3 hours, the dial reads 99F.

Just fyi....

You need a quiet but stong fan.  Otherwise you are being very adventurous. 

I just demo'd the L509x.  It was positioned in open on a mono amp stand, but even after operation for over an hour it was warm but nowhere close to hot, I'd almost call it only slightly warm.  Now obviously in a shelf that will change, and worse in a cabinet, but I was thinking it would be warmer than it was during that demo even though it was out in the open

Best scenario as other has alluded to is to have that unit wide out in the open with maximum ventilation / aeration.
besides seeing it in its full glory is half the pleasure. It doesn’t deserve to be encased in any such way.
I say keep the 590AX II and MAKE IT WORK even if it means a general reconfiguration.

Class A all the way!