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Hi, I have done a search, and I cannot find anything that references pinging noises that result from my Aleph 30 while heating up or cooling down. I figured that it was expanding against the screws and creating a stress, so I tried unscrewing everything (except for the bottom panel) while it was hot and then tightening it all down again, but that didn't fix it. I don't know if this has a sonic effect, but the sudden pinging is startling, and also a little annoying. Does anybody have any ideas? I would love to hear from you.
Follow Ups:
Aside from the turn-on and turn-off transient thumps, my Aleph 30 makes no sound whatsoever as it warms up or cools down.You may want to call or e-mail the boys at Pass to see if they can help determine what's up.
I had the Pass Aleph 3 (not the newer Volksamp Aleph 30). The Aleph 3 had no pinging sounds or any other thermal expansion / contraction mechanical sounds.
Why not call Pass Labs. I called them with a question on my Aleph and they were very helpful.BTW, I, too, have experienced an occasional small ping. But it's so infrequent and I live in a creaky old house anyway so it hasn't been a problem.
If you call Pass, let me know what they say. Hey, you can probably just email them.
My Aleph 60's make considerable amount of popping and pinging while cooling down. I can hear it off and on for as much as 5 or 6 hours after I turn them off. Not a lot, maybe once every 5 to 15 minutes for the first hour. Then more sporadic after that. As far as the amps go. I LOVE THEM! Actually, I am thinking of buying two more used ones. Thanks for the idea.
I took edta's advice and e-mailed Peter Perkins, domestic sales, Pass Labs. I recieved the following thoughtful reply:"The differential expansion and contraction of the metals used in the A30 chassis (extruded aluminum, machined aluminum and plate steel) do sometimes ping as you describe. Our method is similar to yours, to loosen the panel screws and retighten them. You might try just the front and back panels and not the top, and alternate when either warm or cold to see if you can stop the pinging. This is a very random phenomenon that occurs and does seem to be more metallurgical than anything else. I hope you can make the adjustment on your end, but you are welcome to send it to us. We'll probably do just what you're doing, though, so I wouldn't want you to miss out on playing time with the amp in transit."
I will try more screwing around ;), but now that it is colder, I may just leave the amp on, which solves my problem for now.
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