I have lately been noticing a fairly low frequency hum, or more like what sounds like a 60hz buzz coming from the left channel when I first start the amp up. I have isolated it to the power amp by removing the input to it. Also while this is going on the left meter will hold a steady -10db read where the right side which is quiet is where it should be,-20db..
After switched off for several hours this issue occurs on startup, but goes away after it has been turned on for a length of time. After about 30 seconds from cold start, if I turn the left power level down and then back up the buzz goes away and doesn't return until the next day on a cold start.
Any ideas on what this could be? The 3 main boards were rebuilt by echowars a few years ago and I replaced all the outputs with new ones that Glenn had recommended and since then this amp has been dead quiet (Except for the music of course ) . Although I haven't checked the DC offset lately it was quite low on both channels.
One thing that has not been replaced was that big cap. . The protection board is all new as is the two main boards. .
Hoping this thing isn't starting to develop a serious issue as living remote, it is too dang heavy to send by mail, and there is no one within a thousand miles I would trust to work on itl
And besides, I already own a good boat anchor! Thanks for any advice you can offer.
After switched off for several hours this issue occurs on startup, but goes away after it has been turned on for a length of time. After about 30 seconds from cold start, if I turn the left power level down and then back up the buzz goes away and doesn't return until the next day on a cold start.
Any ideas on what this could be? The 3 main boards were rebuilt by echowars a few years ago and I replaced all the outputs with new ones that Glenn had recommended and since then this amp has been dead quiet (Except for the music of course ) . Although I haven't checked the DC offset lately it was quite low on both channels.
One thing that has not been replaced was that big cap. . The protection board is all new as is the two main boards. .
Hoping this thing isn't starting to develop a serious issue as living remote, it is too dang heavy to send by mail, and there is no one within a thousand miles I would trust to work on itl
And besides, I already own a good boat anchor! Thanks for any advice you can offer.