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Before reading Bruno's comments, I didn't know what to make of the heat. I can tell you that I did NOT plan for the level of heat when selecting a case. Few of the cases available have any real cooling functions that are common on class A amps, etc. I find it interesting that other Class D amps don't seem to generate the same level of heat, so I wonder if that has something to do with its increased performance? Logic works in the class A/A-B/B amp performance. I guess the Halcro amps generate a fair amount of heat, but use cases to handle the heat they generate?
An update. So I have three amps and three power supplies in an aluminum case that is well ventilated, passively cooled case. Recently, after being left on for a couple days, the center channel has started clipping and you can hear the power supply turning on and off. I think three in one case is just too much. Will be replacing top of case with even more ventilation and adding cooling fins internally, wherever I can! Weird that only the center one clips, as it's the newer of the three, version 6 vs version 1.
Do you have access to a multimeter with a temperature probe? Maybe the one in the middle is running hotter because it gets less ventilation. And maybe it is not temperature related at all.
Just be careful with them. I try to stay away from them actually; I find them very unrepeatable. I personally like contact surface thermocouples. If your DMM has a port with that option that is much preferred.
