2. tech-talk
  3. 191946-197971

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
jsd52756
432 posts
 

I had one of those bad babies & had the same issue.  I wouldn't turn on again.  It needs some serious help.  If you can personally deliver in lieu of shipping that would be the best bet.  I had mine damaged on the return trip back from service and back it went with zero listening time  Sad story indeed.

Contact either George Meyer AV in Los Angeles or The Service Dept in Bridgeport, CT for repair.  Krell's itself service dept is in a giant holding pattern whilst the company gets sorted out after the owners passing.

hiend2's avatar
hiend2
418 posts
 

Hey make sure the negative and ground are not reversed in the new wiring

Did that here had ground loop

blakeh OP
4 posts
 

Thanks so much for all the feedback!

I have taken the cover off to take a look inside, but I don't see anything immediately wrong or smell anything out of the ordinary.

I do have a large power cable, and I tried re-seating it both in the unit and in the wall. It didn't stop the issue.

I haven't added any equipment, but this is 100% something wrong inside the unit. I really wish I could post the video! That would make what I'm trying to describe much clearer.

I've found a place in Chicago that said they work on Krell equipment. It's about a 75 minute drive, so that will be preferable to sending it off via freight both from a cost and a potential damage standpoint.

I will not be turning it on again.

I don't know if the forum will allow me to post a link, but I'll try. Here is a video of the issue:

http://www.stateofgrace.net/krell.mp4

Thanks!

jea48
4,424 posts
 

I don’t know if the forum will allow me to post a link, but I’ll try. Here is a video of the issue:

@blakeh

That’s not the power transformer making that sound, imo.

http://www.stateofgrace.net/krell.mp4

jayctoy's avatar
jayctoy
4,034 posts
 

OP I did not know you are from Chicago, they are few repair shop here. Midwest , stereo rehab, etc.

More to discover