B.W.R. Audio
New member
- Joined
- Dec 5, 2011
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- 4
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I recently purchased a Mark IV the first version It was built in 1990. I love the amp but it started making a popping and crackling sound even if i unplugged everything thing from it but the speaker(unplugged reverb, fan, effects even tried different cab) it made no difference. Sometimes its really bad other times it stops within a few minutes. As of last night when i kicked it on for practice it was popping worse then ever and within in a few minutes it started sounding really muddy and distorted. It dosnt have mesa power tubes in it but there suppose to be new and they seem to look ok there JJ Tubes and there not getting overly hot or anything. I was planning on buying mesa power tubes as soon as i had the funds to do so, but dont wanna spend the money till i know theres no other issues. I have opened it up and everything looks normal the caps were replaced lasted year with mesa caps. I have also tried changing out preamp tubes one at a time with a good spare i have and it hasnt made any difference at all. Im fairly good at working on stuff like this but im a little intimitied by this one, but ive fixed alot of fenders some marshalls and other various amps. Theres just alot of stuff crammed in this one and id like to have an idea before i tear into it to much. Thanks in advance for any help.