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anyone have any experience with Krell Amps humming

I just got a new Krell Theater Amplifier Standard, and when connected to my system it hums at about 52db, it's not ground loop related as it does not vary with volume at all. (at least I think that's correct) I've done everything everyone will suggest from line conditioning all the way down to reverse engineering my sytem and there is no way to eliminate the hum, I can add to it and have identified a couple of other issues I'll have to resolve, but it's always there. Just curious if that level hum is normal, or if anyone else has any experience with Krell like this, and if so, what they did. I'm about to take the amp back for exchange.
arthursmuck

Showing 2 responses by sogood51

sogood51
2,157 posts
 
You must have the pins if you are going to use the rca's or you will get hum. Did you buy this new? Krell sounds best balanced. The shorting pins go in pin 1 and pin 3.

Dave
sogood51
2,157 posts
 
Rob, I think the RCA center conductor is wired in parallel with pin 2, the shorting pins short pin 1 and 3. I think the small silver piece he is talking about is the cable release. Krell amps come from the factory with the pins in I think? If the amp was new then Krell screwed up or if it was used, the former owner was running it balanced and may have lost the pins. You can bend a small nail to use as a pin if you had to I would think.

Dave
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