Pass Labs heatsinks temperature

John,
Good. Now if others use similar equipment with similar competence, the data could be compared.
As it lies? Well, 3 or 4 others have measured, with unknown means and accuracy, while getting results which confuse me.
No relation to bias condition has been stated, though all are on 'a' amps.

I've read, on the Pass DIY site the bias setting procedure for a Pass designed amp, and it was thorough enough that I have trouble believing an amp could leave the Pass factory and be mis-biased.

Magfan,
Ok, I went ahead and rechecked again as promised, I wanted to be sure my first readings were correct.

I'm using an infrared thermometer and checked from front to rear and all fins in an attempt to find the hottest point on the amplifiers. The hottest point does seem to be near the front panel in between the topmost and second fin. The amps have been kept in stand by for days, I set my cdp on repeat, left the house and let them run for several hours at a moderate volume. I got a maximum temp of 121.4F.

FYI; This is a new pair of amps that are only about two weeks old and I agree; I doubt that Pass would let a set leave the factory without checking and double checking the bias.(As a matter of fact I believe they set the bias, run the amps for 24 or 48 hours and then recheck again.)My needle hovers just to the left of the center line and stays there unless the volume is turned to an unbearable to me level. Though I know this is not much of a scientific way of checking for correct bias setting I hope this helps out anyone with questions on their amps bias setting. To be honest I think that Pass Labs class "A" amps just run cooler than most other class "A" amps.

Good data...and taken after complete warm up.

Most people don't know the difference between heat and tempreture.

An iceberg has more heat than a red hot nail even though the nail is at 500c or whatever.

Pass labs have generous heatsinking and huge transformers. Those 60a monos weigh what......60 or 70lb each? More?
And even though you touch 'em after a good warmup and say 'Not too bad!' all you'd have to do is put em in a smallish room on a cool night and see just how much HEAT they reallly kick out.

I need to make a correction on my last statement; I meant to say that the hotest point is not towards the front panel but in-between the front panel and the rear, right about the middle and in-between the top and second fin. Sorry about that.