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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
ryder
1,689 posts
 
If you have another source say a CD or DVD player, connect that source to another input of your Musical Fidelity integrated and see if the crackling or buzzing sound is there. I have experienced this before and the intermittent crackling sound is from one channel of the speaker. The culprit turns out to be the CD player -aging caps. It's more difficult to troubleshoot where the sound comes from if you have more components in your system. I've looked at the power supply, cabling(power cords), tube preamp and CD player before coming to the conclusion that the latter was at fault. If it's not the CD player then most likely it would be the Musical Fidelity.
greh
134 posts
 
Hello Fatghost,

I had a somewhat similar problem with my Manley Stingray-also a tube integrated-not that long ago.
It turned out to be a bad capacitor in the Stingray.
Good luck!
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
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