Bryston 3B-ST THX woes

[Ike Zimbel]

Hi,
The clicking that you hear is probably the relay on the protection circuit cutting in-and-out. You should definitely contact Bryston about this. They are very committed to keeping their gear in factory condition. I'm pretty sure that the warranty is just by serial number so the bill-of-sale etc. is not an issue.
Having said that, there's no way that a 3B should be getting that hot with a pair of NS-10's as a load. It's possible that your set-up is causing the problem, in particular a HF oscillation that you can't hear but the amp is working pretty hard to amplify. Do your tweeters get hot?
A few other tests:
1) Disconnect the input wiring, put the amp in stereo mode, hook up the speakers (no stray bits of wire, right?) and leave it on. It should stay on indefinitely. If not, it's an amp problem and should go to Bryston.
2) If the amp doesn't shut down, the problem could be with either your input wiring, or your interface.
Best,
Ike

[Charlie S.]

Originally Posted by Ike Zimbel

Hi,
The clicking that you hear is probably the relay on the protection circuit cutting in-and-out. You should definitely contact Bryston about this. They are very committed to keeping their gear in factory condition. I'm pretty sure that the warranty is just by serial number so the bill-of-sale etc. is not an issue.
Having said that, there's no way that a 3B should be getting that hot with a pair of NS-10's as a load. It's possible that your set-up is causing the problem, in particular a HF oscillation that you can't hear but the amp is working pretty hard to amplify. Do your tweeters get hot?
A few other tests:
1) Disconnect the input wiring, put the amp in stereo mode, hook up the speakers (no stray bits of wire, right?) and leave it on. It should stay on indefinitely. If not, it's an amp problem and should go to Bryston.
2) If the amp doesn't shut down, the problem could be with either your input wiring, or your interface.
Best,
Ike

Thanks, Ike. I'll try that.