2. amps-preamps
  3. 1336851638

KRELL Mono Class A amp problem

Dear Audio experts

I have re-activated a pair of older (about 15 to 20 years old) mono Krell Class A amps.

Years ago I used them to drive Infinity RS-Ib speakers with no problems. Now I am driving a a temporary set of Anthony Gallos until I buy Revel Studios (assuming my wife's decorator approves).

Any way, when I turned them on, the power on light on one of them is green and on the other amp it is red.

Both play, but when asked to play rock at loud volumes, the one with the red light shuts down. When I lower the volume, it turns back on.

There is one fuse on each in the middle of the back and it seems to be all right.

When asked to play very loud, both shut down and the come back on when the volume is turned down

Any one have any ideas about what is wrong and how to fix it?

Thanks very much for your help.

Jimmymac928
jimmymac928
tpreaves's avatar
tpreaves
2,686 posts
 
(assuming my wife's decorator approves).

You might want to look at getting into a new hobby. Maybe macramé or needlepoint, providing your wife's decorator will approve of course. Or, maybe just shoot yourself in the head. (That's a joke, I say, that's a joke, son)
Post removed 
hifigeek1
770 posts
 
Usually with old Krell amps the caps go bad and in this case it sounds like the relay/protection circuit. Sooner or later the other amp will do the same thing. I would suggest calling Krell to find out how much it will cost to recap both amps, that way you can decide if you want to get them fixed or not.
More to discover