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Thanks for relpying. I am new to this type of amp. I used to play small fender tweed, so I haven’t tried moving the preamp tubes to different...
Here is the update. I put a clean boost in the effects loop and turn the volume level down, and the noise nearly disappears even the two channels...
Thank you for replying. I bought this though a friend and he contacted the Marshall amp agents in my country to get this brand new. I sent the vid...
yeah, I also read some of them, they have similar problem as mine, but I just want to make sure the problem is exactly what I am thinking about....
thank you for replying!
I just got my brand new marshall sv20h, but I notice there is noticeable noise when I plugin to treble holes. (both jumping cable or use treble...