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After a year of lots of use in practice and gigging, my JJ 6L6's finally went on me in my Mark IV B head. Before I re-order a matched quad from Bob at Eurotubes, I was hoping folks here could give me some recommendations of other good power tubes to consider. I have heard lots of good things...

Hi all, I was playing at practice last night and my Mark IV B head started doing things I've never heard...I would be playing and touch nothing and then the volume would drop/ cut in and out, with a sound almost like a scratchy volume pot. Other times I would be playing and the amp would get...

Hi All, I don't knwo if I should post this in the Mark IV section, but I played an Electra Dyne a few weeks ago and fell in love with sounds I was getting. I have been playing a Mesa Mark IV B for the last two years, and gigging about twice a month in a classic rock/pop cover band. I never...

I am looking to purchase the hi gain 6L6 tube kit from Bob at Eurotubes. Has anyone here used this kit in their Mark IV and if so, what do you think of the sound? I used replaced the stock Mesa tubes with JJ EL84's in my Nomad 45 and it was a noticeable improvement, so I'm hoping the new...

I'm thoroughly enjoying my new Mark IV head. All is good running Simul-class and Triode, on the Tweed setting - great classic rock tones. The only question I have is about the master volume. I played at band practice this weekend and barely got over 2.5 on the master volume and I was...