I solved this with computer cooling fans installed in back of a completely enclosed antique Chinese cabinet. I drilled air intake holes on the back toward the bottom. Then I installed four 92 mm computer case cooling fans from Noctura on the back toward the top. These are 12 V DC fans that I plugged into a transformer (one of those black plastic plug-in things) on a lamp dimmer. Totally quiet except on full speed and no discernible sound on the speakers.
I have a Magnum Dynalab 209 and a Manley Chinook inside. Temperatures were above 110 before. Now it remains room temperate.
I have a Magnum Dynalab 209 and a Manley Chinook inside. Temperatures were above 110 before. Now it remains room temperate.