2. amps-preamps
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Pass Labs heatsinks temperature

Hi all

I have Pass Labs xa60.5 monoblocks and they are always warm to the touch at the heatsinks and not as hot as other class A amps I'm familiar with. A friend from the US that has the same model visited my place and told me his amps ran very much hotter than mine. I got concerned and looked at the manual where temperature was estimated at 55 degrees Celsius. I estimate mine at around 40 Degrees. I'm concerned my amps are not biased to pure class A as they should be. I contacted Pass and while they repeated that heat should be around 55 deg. they had no idea if my concerns are valid and they sounded quite mysterious about it. Did anyone has a xa.5 series model ever measured its temperature or has an idea what can I measure without opening the amps (with a technician) that will prove that they are working only in pure class A ?
Thanks in advance
icorem

Showing 1 response by james123

james123
61 posts
 
Hi. Im not sure if this helps at all, but i have a pass xa30.5 and it just gets warm to the touch. After an hour or so the whole thing is warm, certainly not hot. even the whole thick metal front panel is warm as well as the fins. im no expert on amplifiers, but it seems fine and has always reached that temperature since the day i acquired it five years ago.
i observe that the sound quality is not optimal until it is warm. i would be very cautious about opening a piece of kit like that. i wouldnt attempt it.
regards.
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