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Issue with Krell KSA-250

Hello-

It's been a minute since I've been on the forums here, but I'm glad they are still around!

I am the second owner of a Krell KSA-250 amplifier. For the past 10 years it hasn't given me any problems. Then today, when I turned it on, it emitted a rather loud buzzing sound. This wasn't coming from the speakers (like a ground loop hum), this was a very startling almost "mechanical" buzz sound. The buzz does not stop until I turn the unit off.

I'm not sure where to start. I called my local audio repair store, but they don't work on Krell. They suggested I contact Krell, which is my next step, but seeing as I'd have to freight this for it to be repaired, I'm hoping someone here might shed some light on what's happening. I've made a short 15-second video of the issue, but I don't think I can upload it here. I'm happy to provide it though.

Any thoughts you might have would be appreciated.

Thanks,

Blake

blakeh
stereo5's avatar
stereo5
6,405 posts
 

You may not be able to send it to Krell.  There is a thread where a customer sent his amp back for repair and 9 months later, he still hasn’t gotten it back.  The owner of Krell passed away and the company has been closed to grieve.  The person said no one was answering the phone. 

blakeh OP
6 posts
 

Thanks for the response. After I posted this message, I saw on Krell's FB page that they had essentially closed after the death. It looks like they are slowly opening up again, but I'm guessing there is a backlog, so it may not be the best choice to send it to them.

jasonbourne71's avatar
jasonbourne71
1,202 posts
 

It's the power transformer. Can you still play music through the speakers? 

willcycle
49 posts
 

The problem is probably the transformer drawing a lot of current.  Are the heat sinks getting hot fast?

invalid
1,200 posts
 

Though I wouldn't rule out the power transformer, it's more likely to be a bad capacitor.

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