The guy that I’ve already repaired 2 of these amps for has another one .
The 3rd amp he has never had it repaired .
He bought a cheap oscilloscope off eBay to set the gains on these amps
He had the amp powered on and touched the positive lead to the posit r speaker terminal and then went to touch the ground lead to the negative speaker terminal and as soon as he did it blew the outputs .
What would cause the amp to blow the outputs ?
Also is there a way of avoiding this in the future if he uses the scope again to set the gains like level matching
The 3rd amp he has never had it repaired .
He bought a cheap oscilloscope off eBay to set the gains on these amps
He had the amp powered on and touched the positive lead to the posit r speaker terminal and then went to touch the ground lead to the negative speaker terminal and as soon as he did it blew the outputs .
What would cause the amp to blow the outputs ?
Also is there a way of avoiding this in the future if he uses the scope again to set the gains like level matching
Does the scope work normally?
There is nothing that would cause a scope, connected across the speaker terminals, to damage the amp.
What was the cheap scope?
What sort of probe(s)?
There is nothing that would cause a scope, connected across the speaker terminals, to damage the amp.
What was the cheap scope?
What sort of probe(s)?
There's no reason that a battery powered scope would cause the amp to be damaged using a single probe. It would be the same as touching the probes of a multimeter across the speaker terminals.
He used 2 probes 1 for the positive and 1 for the negative so that shouldn’t cause anything to happen either correct ?
He almost certainly, whether he will admit it or not, slipped with the positive lead and shorted it to the case. Either that or he crossed the leads accidentally and shorted between the positive and the negative terminals. I've had experience with these amps before, I think I still have two of them in storage, not the 17K mind you but a couple smaller ones. I would never put either one of them in any system that I own. Garbage as far as I'm concerned. The ones I have are from several years ago somewhere around 2009/2010 or so. So they are kind of old so maybe they have gotten better since? The only other thing I can think of is the speaker terminals are loose or have bad solder joints on the board and pushing the probe into the terminal caused something to move on the board. Maybe.