2. amps-preamps
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Slight "Crackling" noise in right channel of amp

Hello - I just picked up a Musical Fidelity KW500 integrated and it's sounds amazing. However, when I stopped playing the music, I noticed that with the volume dial at about 50% and no source playing, there is a crackle noise that comes from the right speaker. It's not extremely loud, but it's loud enough that I can barely hear the 'crackling' from my listening position (7' away) if I listen for it. The other channel has noise if I get up close, but it's constant and smooth...like it should be.

I have swapped cables and replaced cables to confirm that it is definitely the amp channel that is the culprit, and not the speaker.

Now, the music sounded amazing, but because of this, I can't help but think that this is taking away from it somehow and that it could sound even better.

Does anyone have any idea what might be the cause of this unwanted noise? I plan to call Musical Fidelity on Monday but I'm just fishing for thoughts/ideas in the meantime.

Any feedback would be greatly appreciated.
fatgh0st
oregon
820 posts
 
Don't place your cell phone near the speakers.
fatgh0st OP
43 posts
 
Unfortunately, it makes the noise when there is no source hooked up to the integrated at all which is why I think it has to be something in the MF itself. As for the cell phone, I try to never take that into my listening room...just another distraction :-)
wshields
12 posts
 
I had the same problem. It looks like this might be a somewhat common problem for KW500. http://forum.audiogon.com/cgi-bin/fr.pl?aamps&1142286037&read&keyw&zzcrackling+ I sent it to Signal Path and they replaced a tube. It fixed the problem. Have since sold it to go to EMM straight into Pass 350.5.

Walter Shields
vett93
205 posts
 
I think your KW500 uses 6SL7s in the preamp section. These tubes have high gain and are not as quiet. Do follow the suggestion of swapping tubes from side to side. If the noises follow the swapping, then it is quite obvious.

If the noises are indeed from a bad tube, order some tubes from a reputable dealer. Some people here stated that they had good experiences with upscale aduio. With 6SL7s, I would order platinum grade to get lower noises.

Hope it helps.
catsally1
8 posts
 
I have a crackling sound in one of my speakers. When I switch speaker cables the crackling sound moves from left to right speaker. My equipment is Wilson Watt Puppy 6, BAT VK 51 SE, Levinson 432  amp, and Siltech speaker cables and interconnects. I've been told it's a grounding issue. I'm in the process of listing my equipment on this site so what should I do?
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