Bass Became Over Powering and Boomy

Discussion in 'The Workbench' started by matttornado, Jan 27, 2020.

  1. Tatzmann

    Tatzmann Well-Known Member

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    Sorry didnt had time to read the whole thread,
    so if brightcaps has been suggested already
    then pardon my useless babblings.
     
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  2. matttornado

    matttornado Well-Known Member

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    It's all good. That was a very good suggestion that I'm going to look into.
     
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  3. matttornado

    matttornado Well-Known Member

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    So I took a deep dive into this last night and confirmed that all caps on CB are good. Resistors all measured to spec.
    Voltages look good, bias is set at ~37mA (B+ was 480VDC). I do have one 6CA7 that measure 10mA less than the others no matter what socket it goes in. I matched that with the highest current draw tube to try and balance each side out.

    After much frustration and self disappointment, I grabbed a beer & took a break. I then decided to clean all of the input and output jacks with Deoxit and close it back up and test again.

    I played with a few different guitars and it seemed a lot better, especially when I cranked it. I have a PPIMV Rich mod. I hooked my attenuator up and cranked the master above half way to get the presence control to work and overall it sounded good except that I noticed that when I play single notes, they sound kind of choppy if that makes any sense?

    Either I'm a complete idiot or my mind / ears are playing tricks on me. I'm 52 years old so both are very possible. LOL
     
  4. Tatzmann

    Tatzmann Well-Known Member

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    I wouldnt totally rule out that its just
    a changing conception of hearing, especially
    when diverse guitars are used, but in my
    experience if a good Marshall sounds bad
    at a given moment then something is wrong
    with it.

    These types of failures, if there is one, can drive
    one mental. I let these things go for a while and
    come back to it, but you already did.

    Man:(, i sometimes get one ear stuffed up a
    little bit this can throw things off too, often
    times i realize it first when its almost shut.
     
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  5. matttornado

    matttornado Well-Known Member

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    I played it this weekend and it still isn't right. It's like the overall voicing of the amp changed or something. IDK
     

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