>

PPIMV with NFB Control.

Discussion in 'Marshall Amps' started by gregr, Aug 8, 2021.

  1. gregr

    gregr Well-Known Member

    Joined:
    Jul 30, 2014
    Messages:
    495
    Likes Received:
    516
    Is anyone rocking these two controls and how do you like it?
     
  2. Stephen H

    Stephen H Member

    Joined:
    Jun 21, 2021
    Messages:
    39
    Likes Received:
    33
    Location:
    Nimbin
    I have a ppimv but no nfb control other than a soldering iron, and I don't know what type of ppimv Mr. Friedman is talking about in your sig., but my type 2 (dual 1M with 1.8M r's) does not change anything noticeably to my ears, at least down to half, I've never needed to try it lower.
     
  3. Stephen H

    Stephen H Member

    Joined:
    Jun 21, 2021
    Messages:
    39
    Likes Received:
    33
    Location:
    Nimbin
    Thinking about it, I didn't use shielded cable for mine, and I'm guessing, (and if anyone knows better, please chime in) that using shielded cable would have a kind of variable roll-off via the capacitance of the cable and resistance of the pot/s, so without the shielded cable there would be less/no high frequency attenuation (?)
     
  4. gregr

    gregr Well-Known Member

    Joined:
    Jul 30, 2014
    Messages:
    495
    Likes Received:
    516
    I appreciate the replies.

    So I don’t have much experience. The sig is just an appeal to authority.

    I noticed a major difference changing the PPIMV on my Vintage Modern over to a traditional MV. I made other significant changes as well, most of them incremental, but I’m pretty sure the MV was done by itself. The Vintage Modern sounded pretty terrible with the volume below 4 and it seems like a lot of people are using attenuators with them.

    The amp still sounds best loud, but now I can just crack the volume and the amp still sounds pretty good.
     
    Last edited: Aug 9, 2021
  5. Emiel

    Emiel Member

    Joined:
    Jul 22, 2008
    Messages:
    39
    Likes Received:
    34
    Some PPIMVs work better at low volumes than others. Part of the reason why I finally got a Plexi clone is because the Rich II mod PPIMV works so well. I don't hear any significant tonal changes when I turn it way down. Really impressive.
     
    matttornado likes this.

Share This Page