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Slight hum from SLI-80 power amp

I own an SLI-80 Amp for a little over a year.  My system has developed a very low, slight hum only on the right channel. One has to get right up to the speaker to hear this hum, but it is still a hum that should not be there.
Any ideas where I should start looking to eliminate this hum?  Thanks
richfrank

Showing 3 responses by jtcf

jtcf's avatar
jtcf
1,620 posts
 
A loose or dirty cable connection could be the culprit also.If the tube swap gives no results try cleaning all of the connections.
jtcf's avatar
jtcf
1,620 posts
 
You already swapped the speaker cables,right?Then swapped the interconnects?Take the sub/subs out of the system and see what happens.Take away the source leaving just pre and amp.Next just try the amp and speakers together with no pre or source.You're eliminating one thing at a time to hunt down the hum.Be sure to power down everything each time before pulling out cables!!!
jtcf's avatar
jtcf
1,620 posts
 
Some people are able to solve a ground loop problem by lifting all of the grounds with cheater plugs except for one.IN THEORY everything is hooked together with only a single ground and you should be safe from being electrocuted in case of a short...makes me nervous.Get a professional opinion first.Please!
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