2. amps-preamps
  3. 147940-3215

amp clipping earlier than usual?

I have a pair of mono amps with clipping indicator LEDs. One of the amps' indicators is lighting up for the first time. I've never been able to make them light up before. But it only happens on one of them. It lights up way sooner than as loud as I typically max them. I don't hear any distortion. So I'm thinking it's not an output transistor. These are LSR&D Superamp monos, 300wpch. Anyone? TIA
csontos
csontos OP
1,311 posts
 
Well, the only caps not replaced are the large ones in the psu which I just happen to have Kendeil replacements for. But is there a way to be sure?
mrdecibel
3,065 posts
 
So the amp was " not " completely rebuilt " ? I would replace those caps for sure, as it cannot hurt.
csontos OP
1,311 posts
 
Right. They seem to be the ones that are usually kept in place during rebuild. I guess they are more robust than the smaller ones.
tomic601's avatar
tomic601
12,989 posts
 
You can visually inspect for bulges, leaks, test for esr and traces of 60 HZ downstream
or just get on with the business of it...
remember the voltages you are playing with can be fatal
get help versus poking around with a fork....
celander's avatar
celander
1,503 posts
 
Sounds like a trip to an electronics shop is in the future for both amps, if not for anything more than an inspection and tuneup.
More to discover