Does the problematic Aegir shutdown when using it in stereo mode? Someone asked this to your original post but I never saw if you answered it.
Don't know, I've never tried that, to be honest. Should be worth a shot.
It's possible Schiit couldn't replicate it because they don't sit around in rooms that are 80 degrees haha. 80 degrees is hot as hell to be inside your house. Have you tried them in any other rooms? Possibly a cooler one?
They don't sit around in 80 degrees rooms? You've obviously never been to Valencia… ;p
But no, never tried it in other rooms, because I would have to move the whole system to a different room to replicate the results. Always change only one variable when you test something.
But I bought the Aegirs in the middle of last winter, and the problematic one tripped into fault mode within the first hour at a room temperature of well below 70 degrees.
And yes, I know, I should have sent it back right away. Don't start, I'm annoyed at myself for this enough as it is. ;p
At first the shutdowns were infrequent enough at about once or twice a week to not warrant the hassle. But now it happens more and more often, up to twice a day. And completely independent of the room temperature as well. The 80 degrees I mentioned in the original post is by no means an average, it's the maximum my living room gets to. It usually sits at at around 75 to 78 over the summer. Not that much lower than 80, yes, but still.
for the dual Aegirs, are they sitting side by side on the bottom shelf of that rack? if so, the inner facing halves of each amplifier will run hotter than the out-facing heatsink halves. If there is only a single thermal sensor per stereo amp, instead of one per heatsink, then that might explain the apparent differing thermal trigger thresholds.
No, the rack is relatively new. Until a few weeks ago, they were both sitting near the speakers on the floor. Not directly on carpet, though, but on wooden boards, to ensure that air can circulate below them. I even tried a set of risers to allow for even more air circulation under them, to no avail. While sitting on the floor, they both had about a foot of air between them and their respective speakers, about a foot to the wall, and nothing to obstruct any of the other sides. I even positioned the problematic one so that it gets blown at by the AC directly.
did you swap the channels by moving the input and output leads? or did you physically swap the two units?
All of the above.
The Fluke 62 IR thermo may give lower readings on shiny or light colored objects; try boiling some water in a Stainless or shiny copper pot and take a reading of the outside walls of the pot (away from the bottom edge adjacent to the burner.)
I know, that's always to be expected with thermometers that rely on light emissions instead of direct contact. The measurements I took weren't so much to be relied upon as absolute values. I was mostly interested in any potential differences between the two, whether the problematic one would run hotter than the other one. But they were always within just a few degrees of each other.
With something like a Kil-a-Watt meter ($25-$50), take AC power (both the Watt and VA) readings of each unit when at room temp & first turned on, and after warm-up to see if there are any significant unit-to-unit differences.
Great suggestion, I actually haven't thought of that yet. I will definitely try that.
worst case (best case???) hang on to your wallet, Tyr is (are) coming.
Oh, yeah. A pair of those are already squarely on my list,
iff they can handle low impedance loads and do so without breaking a sweat. I have my eyes on a pair of Magnepan 3.7i for somewhere in the next 24 to 36 months, and I would never expect the Aegirs to handle those adequately. Until then, though, it would be nice if I could keep using the Aegirs in mono. I don't listen loud enough to stress the currently remaining one Aegir in stereo enough to NEED them in mono, I just like the way they sound.
