Amp protection lights on

[PWRmx24]

Interesting comment by Gene Delasrio in his review of LBM speakers.......
"Class-A/B may not be quite as efficient as class-D, but it is more reliable on the whole, and with such a massive heatsink, it looks like a unit that was built to last."

 

[TLS Guy]

Interesting comment by Gene Delasrio in his review of LBM speakers.......
"Class-A/B may not be quite as efficient as class-D, but it is more reliable on the whole, and with such a massive heatsink, it looks like a unit that was built to last."

Looks can be deceiving. Those amps are not particularly long lived, because of design problems. Class A/B amps are not inherently longer lived than class D.

 

[PWRmx24]

Correction to my post....that review was James Larson.
He states in another article
"So what then is the advantage of an analog amp? Lower-cost analog amps tend to be more reliable than lower-cost class-D amps. Analog amps can also have more headroom than a similarly rated Class D w SMPS amp."

Perhaps his caveat is "low cost" class D amps. Maybe his concern is the power supply. I think those are modular and user replacable on Buckeye amps.

 

[PWRmx24]

I ordered the 3 ch Purifi 2nd gen EIGENTAKT from Buckeye.

 

[carlosmiguez75]

Had a similar issue with an old Parasound amp—turned out to be a bad transistor causing the protection circuit to stay on. Since you’ve already disconnected the speakers and it’s still happening, it’s likely an internal fault. You could try swapping inputs just to rule out a weird signal issue, but if that doesn’t change anything, it’s probably time to open it up and check for burnt components or loose connections. If you're not comfortable poking around inside, a tech visit might be the safest bet.