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Thread: Boosting a Plexi

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    Member ebagjones's Avatar
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    Default Boosting a Plexi

    Looking to pick the brains of the friendly and helpful SD forum crew. I have a Plexi Bass amp and a Victory Sheriff 44 head. Both have that wonderful Plexi DNA of course but Iíd like to be able to get to 80ís/90ís levels of Marshall gain without modding the amps. Iím looking for an overdrive that will push it to higher levels of gain/sustain while changing the essential character of the amp as little as possible.
    Right now Iím using a J Rockett Animal OD with the gain at 25% and the volume cranked. It sounds decent but a bit raspy still. Also the pedal doesnít have a lot of output with unity volume at about 2:30, so Iím not getting as much push as I probably could out of it.
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    Mojo's Minions LLL's Avatar
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    Default Re: Boosting a Plexi

    I built my plexi - '68 50W with the .68uF on V2.

    Use what the dudes of old used to boost. With the amp cooking (but not dimed):

    - EQ (MXR 6 Band has guitar-centric bands and +/- 18dB boost)
    - Dist/OD with the dist/OD off/low and the level cranked (BOSS DS-1, MXR Dist+, etc)
    - Rangmaster clone

    etc

    or clean boost

    Keep in mind the more you push it, the thicker the amp will get - may want to pick the EQ or Rangemaster clone for the hi-pass feature
    (thus keeping the amp's lo-end tight).
    Last edited by LLL; 08-12-2019 at 01:47 PM.
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  3. #3
    Administrator Mincer's Avatar
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    Default Re: Boosting a Plexi

    I'd add a gain stage pedal, like the Palladium.
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    PenultimateTone Member Demanic's Avatar
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    Default Re: Boosting a Plexi

    Keeley Katana with the volume knob in the "out" position.

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    Member ebagjones's Avatar
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    Default Re: Boosting a Plexi

    Quote Originally Posted by Mincer View Post
    I'd add a gain stage pedal, like the Palladium.
    That looks pretty cool - I like how it has EQ because itís easy to add too much of the wrong frequencies when boosting. Are they pretty easy to use? Can you start with the knobs at noon and tweak from there? Also I assume it doesnít overly color your tone, right?
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    Administrator Mincer's Avatar
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    Default Re: Boosting a Plexi

    Quote Originally Posted by ebagjones View Post
    That looks pretty cool - I like how it has EQ because it’s easy to add too much of the wrong frequencies when boosting. Are they pretty easy to use? Can you start with the knobs at noon and tweak from there? Also I assume it doesn’t overly color your tone, right?
    Well, it is essentially adding another channel to your amp. So you can just treat it as another channel with its own EQ. It can color your tone as much or as little as you want.
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    LoveMachineologist jeremy's Avatar
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    Default Re: Boosting a Plexi

    the palladium is a great preamp with lots of tonal control but i dont know how it does boosting an already overdriven amp. if you run your marshall clean, it would be good as a high gain channel. if you want to boost the cranked up marshall then a treble booster or eq or more transparent overdrive like the forza or maybe even the killing floor boost might be cool

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    PenultimateTone Member Demanic's Avatar
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    Default Re: Boosting a Plexi

    Quote Originally Posted by jeremy View Post
    the palladium is a great preamp but i dont know how it does boosting an already overdriven amp. if you run your marshall clean, it would be good as a high gain channel. if you want to boost the cranked up marshall then a treble booster or eq or more transparent overdrive like the forza or maybe even the killing floor boost might be cool
    Like I said, Katana.

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    Mojo's Minions Gtrjunior's Avatar
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    Default Re: Boosting a Plexi

    Friedman buxom boost

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    Ultimate Tone Slacker Nostalgic Distortion's Avatar
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    Default Re: Boosting a Plexi

    Keeley Katana, a modded Blues Driver, EHX Soul Food, Etc...

    Basically any clean boost should push the natural charter of of the amplifier without adding any additional color to the signal....
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  11. #11
    Administrator Mincer's Avatar
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    Default Re: Boosting a Plexi

    Other option is a flat overdrive like the Forza might be a good choice, too. It doesn't have the missing bass and boosted mids of a TS-based pedal...it boosts everything equally, but you have that 3 band EQ to select the right band to boost.
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    Tone Member Big Mike Blues's Avatar
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    Default Re: Boosting a Plexi

    Archer or klon type with the gain turned down.
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    Mojo's Minions
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    Default Re: Boosting a Plexi

    I tried a JHS Morning Glory in front of my Marshall and it was an absolutely glorious overdrive sound.

    I chose the Archer Ikon however, because I do a ton of arpeggios and notey stuff -which the Ikon really made really present and brilliant.

    But had I ONLY been looking for giant chords and power moves -I would have chose the Morning Glory.
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    Tone Member Big Mike Blues's Avatar
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    Default Re: Boosting a Plexi

    You know, I also love the Greer Lightspeed in this instance.
    It 'clears' out some of the mud while adding the gain and volume. Changes the tone slightly depending on how you set the EQ, but it really articulates the midrange smear that can happen.
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    Default Re: Boosting a Plexi

    Depending on exactly what you want from the resulting tone, try either a Boss SD-1 (aggressive bite, trebly), Ibanez TS-9 (smoother, compressed, tight response), or Moser M2G (fat, aggressive).

  16. #16
    Mojo's Minions Laughing Kookaburra's Avatar
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    Default Re: Boosting a Plexi

    I use an Analogman Beano Boost with a JTM 45 type amp. The low end on the amp has been tightened up, so it drifts a bit toward an early bass spec plexi.

    The Beano is based on a Rangemaster, but can be treble booster, mid boost, or low end boost.

  17. #17
    One of Jerry's Kids Securb's Avatar
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    Default Re: Boosting a Plexi

    Quote Originally Posted by Big Mike Blues View Post
    Archer or klon type with the gain turned down.
    That is exactly what I was going to suggest here is a great one under $20 super quiet and built like a tank.

    https://www.aliexpress.com/item/3291...27424c4dA1hocH

  18. #18
    Toneologist YeRedHouseOverYonder's Avatar
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    Default Re: Boosting a Plexi

    I mean, it's already been said multiple times, but you can't go wrong with tried and methods such as a Treble boost, Tube Screamer, or a Klon pedal (I use mine as a clean boost).

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    Last edited by YeRedHouseOverYonder; 08-24-2019 at 07:13 PM.

  19. #19
    Ultimate Tone Slacker Red_Label's Avatar
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    Default Re: Boosting a Plexi

    I actually really liked the Bogner XTC Blue [small] pedal running into the front of my Germino Club 40. TS808, OCD, and Sunset were also great into that head. I liked my Bogner Harlow into the plexi channel of my Friedman Smallbox. So many great ODs out there these days for accomplishing what you seek. When I was a young player in the 80s... we mostly just had our trusty TS9s for such duties.
    Last edited by Red_Label; 08-24-2019 at 07:14 PM.
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  20. #20
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    Default Re: Boosting a Plexi

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    Last edited by 67Mopar; 08-26-2019 at 05:44 PM.

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