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OK, good. But I'm not clear on Mesa's tube bias. I have understood that Mesa has certain "stadards" when selecting tubes. So how do I know if the tubes I want to purchace online (or in the store for that matter) are "selected for Mesa'a bias?" Are their standards really that much higher than...

Good day to 'ya, I need to replace my power tubes- in my Mk IV-B combo- and was wondering if any harm would occur if I mixed a quad of JJ 6L6's with my Mesa "brand" 12AX7 preamps. I can't think of any reason why not to experiment, but I don't want to thrash my amp either! The manual doesn't...

I have not purchaced new tubes yet...although I think I've narrowed my decision down to a quad of JJ 6L6/5881 or Mesa's version of the same. I've never tried JJ's. I've had Mesa 6L6's for a while. But I was looking to change things up a bit. I haven't heard of "winged c tubes."

I tried cleaning the loops and inputs and that hasn't done the trick. I'm guess I'll change the power tubes first and go from there.

I've recently experienced a loss of volume when playing through various channels on my Mk IV combo. Switching channels doesn't help either. I have a changed out a couple of suspect 1/4" chords and thought that did it. But the issue came up again. It has been a long while sinse any of the...

Hello all, I am playing through a Mk IV Widebody combo with a 300watt EV speaker. I have pulled great tone out of the speaker considering there's only one 12 in there. But I'm starting to think about adding a cabinet to the setup. I'm not sure if I should add a 1x12 cab or go for a 2x12. I'm...

I have a Mark IV combo (B version) and at my last show the footswitch "freaked out!" In the middle of a song the LED lights on the footswitch began blinking and the amp changed channels several times. The channel "switching" stopped after I pressed R1 and I had no problems the rest of the...

Hey there, I have a Mark IV combo that i have fallen in love with. The effects loop is one of the many things I like and I have learned of an efficient and effective way to set up my pedal board with the effects loop. The setup is a little complex but my tone remains strong and intact...which...

Hi there, My name is Frank and I am a guitarist/composer in a band named Groove Movement. We are out of San Antonio and play all sorts of gigs here in town and in Austin mainly. I was looking at the BB and found the gig section (lookinig for TX stuff) and clicked on your name. I went to your...