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Can anyone tell me if they?ve experienced the same thing with their Vox AC-30. I?ve been trying to find a blog/thread of the same problem but have been unable to find anything similar to this specific problem. I just purchased this amp and have been using it non-stop for the last two months without any issues. It is the class-A power AC-30/6TB model made in (I believe 1997) with the blue Vox Alnico speakers.
When I brought it out to my last gig I noticed that after about a half hour of playing a disturbing sound was intermittently starting to happen.
It starts to produce a strange octave pedal type noise where when you play one note it sounds like it?s being multiplied (much like an octave pedal) in a slightly out of tune way and starts to sound very muddy. When this ?effect? is produced, it?s accompanied with a loud hum. The amp is usually pretty quiet hum-wise. It happens in degrees, but when it?s in full blown-out warble mode you can?t play an open chord with any consonance. I?m almost positive that it?s heat related as when I used it at our last practice it only started happening after a few hours of playing and at which point the amp was really hot. The funny thing is that it remained in this ?mode? without popping a fuse or dying? It kept on working but making this horrible sound.
When it starts to happen, it?ll make the sound for maybe a few seconds and then come back to normal. It?s only as time goes on that it starts to become more frequent until it stays in this ?mode?.
Both lights stay on all the while, with no flickering or anything.
Can anyone help?
Thank You!
When I brought it out to my last gig I noticed that after about a half hour of playing a disturbing sound was intermittently starting to happen.
It starts to produce a strange octave pedal type noise where when you play one note it sounds like it?s being multiplied (much like an octave pedal) in a slightly out of tune way and starts to sound very muddy. When this ?effect? is produced, it?s accompanied with a loud hum. The amp is usually pretty quiet hum-wise. It happens in degrees, but when it?s in full blown-out warble mode you can?t play an open chord with any consonance. I?m almost positive that it?s heat related as when I used it at our last practice it only started happening after a few hours of playing and at which point the amp was really hot. The funny thing is that it remained in this ?mode? without popping a fuse or dying? It kept on working but making this horrible sound.
When it starts to happen, it?ll make the sound for maybe a few seconds and then come back to normal. It?s only as time goes on that it starts to become more frequent until it stays in this ?mode?.
Both lights stay on all the while, with no flickering or anything.
Can anyone help?
Thank You!
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