Impossible to ascertain DIY and especially remotely. A professional tech look-over and analysis required on your source AND/ OR integrated amp
Before you do that, eliminate the other variables wherever possible
(1) swap in your other speakers .... is the same issue still present ?. If yes, then it’s highly likely of a new FUHBAR in your upstream source and/or amp.
(2) Swap in an alternate source .... repeat exercise. If it’s still there then it’s highly probable that your amp that needs to be serviced.
I had a new comparable issue with an intermittent output FUHBAR arising suddenly in my “C” system integrated amp. It still worked but with an intermittent partial loss of output in one channel.
I took it in to a professional tech who tested it on his bench and quickly diagnosed the issue that was not visible to my naked eye. It was a failing output solder joint that was intermittently arcing ... that was a cheap and fast $100 fix .
GOOD THING I DID IT .... This was no DIY matter and not an item to ignore .... it was a potential fire hazard waiting to happen .
FWIW
Before you do that, eliminate the other variables wherever possible
(1) swap in your other speakers .... is the same issue still present ?. If yes, then it’s highly likely of a new FUHBAR in your upstream source and/or amp.
(2) Swap in an alternate source .... repeat exercise. If it’s still there then it’s highly probable that your amp that needs to be serviced.
I had a new comparable issue with an intermittent output FUHBAR arising suddenly in my “C” system integrated amp. It still worked but with an intermittent partial loss of output in one channel.
I took it in to a professional tech who tested it on his bench and quickly diagnosed the issue that was not visible to my naked eye. It was a failing output solder joint that was intermittently arcing ... that was a cheap and fast $100 fix .
GOOD THING I DID IT .... This was no DIY matter and not an item to ignore .... it was a potential fire hazard waiting to happen .
FWIW