I purchased a new DSL40CR a few months ago. I think I need to replace some of the tubes/valves. The product is still under original manufacturer warranty, so I would like to take it to someone qualified to work on Marhsall amps, rather than change them myself. I have never owned a brand new amp before, so I don't want to void any warranty. How can I locate a proper amp technician in my area (Buffalo, NY) to help me with this? Appreciate any help. Thanks .
My 1974x amp is quiet when nothing is plugged into it, but as soon as I plug my intrument cable into the non-tremolo channel, I get this awful cyclic noise. Does anyone know what to do? I replaced the ECC83 tubes one by one (testing it between each tube replacement), but it didn't fix the problem.
Here's a video of my problem.