I too have the MXR and they stay pretty cool but I dont listen at loud bolumes (<75db) and my speakers are 8 ohm nominal and fairly efficient. I used to have the Pass XA160 and there is no comparison. My room would get noticeably hotter with the Pass. I am very happy with my MXR.
Ayre amps - cool running?
Can anybody with experience with Ayre amplification tell me how hot or cool they run? I've had a big Krell, which was very warm when on but no music, and downright hot when actively being used, and I've had big Simaudio monos which were cool when on but no music, and only slightly warm under most conditions.