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It sounds like you have a pre-amp tube issue. If reverb doesn’t work, it’s either v4 or v5. If Channel 2 works (which is Mark 1 mode) but channel 1 isn’t clean and strong, check v3 - possibly v3B is bad).

Lots has been written over the years regarding the Mark V's Channel Switch popping design flaw. There has never been a solution identified, as it is most likely a timing (RC) or capacitor grounding issue in the mute circuit areas. If there is any update of a solution, I haven't seen it...

I did send my Mark V 40th back to Petaluma. They said that they did a thorough check out of the amp, but nothing was wrong with it. The channel switching noise is inherent in the design due to the excessive voltages being switched. Do the lower power Mark V versions or the Mark VII exhibit...

I have a Mark V 40th Anniversary wide-body Combo. I also have a Mark IV, and a Mark IIC+, all bought new with EVM-12L speakers. They are all great amps. I have primarily used the Mark IIC+, and the Mark IV, but more recently the Mark V. It is a wonderful amplifier, and very flexible. I can...

Hi, EV all the way. Had to get 8/32 1&3/4" screws and drill 2 small holes in the back cover and move the reverb to the back. But, EV is the way to go with the combo's in my opinion. Cheers, G

Wanted - Mesa Boogie Thiele with EVM-12L or shell without in mint condition in creme or quilted maple hardwood. Will pay top dollar. Gary

Thanks for your suggestions. I'm leaning more heavily now towards the "Factor" series. Probably start with the Timefactor, then need to decide Mod or Pitch order. The nice thing about the G-Major 2 would have been the integration factor, incl. compressor / Noise and some of the pitch effects...

Hi all, I'm an effects newbie, looking for help on studio class effects. I play mostly jazz styles, a little rock and blues with a multitude of archtop / 335's / and Nik Huber guitars thru EVM-equipped Mark IIC+ and Mark IV combos with an EVM Thiele extension. I want to use the Marks for...

Hi all, A few questions - could use some help and insight please... Anyone have any really good settings for a Mark for clean archtop L5-style jazz with good clarity and good bottom? Anyone use a Mark combo with any of the Raezer's Edge cabinets? Given that one can't get a new EVM-12L with a...