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   JMP-1 Standard, Deluxe, Platinum Mods & Upgrades

  

Marshall JMP-1 Mods
Standard Mod™
  $295.00
Deluxe Mod™  $345.00

Platinum  Mod™  $604.00  

Platinum  Mod™
  $604.00  International Customers! 

Midi Dump  $20.00  (see bottom of page) 
Upgrade from Deluxe To Platinum  Mod™
  $259.00


 

"In the studio or live on stage, this is one of the most versatile & inspiring tone-machines there is!"

 

  • As used by;
  • Billy F. Gibbons - ZZ Top
  • Brad Whitford - Aerosmith
  • Keith Urban - Country Legend
  • Vivian Campbell - Def Leppard / Whitesnake / Dio / Riverdogs
  • Jason Hook - 5 Finger Death Punch / Alice Cooper  
  • Neal Schon - Journey  
  • Michael Wilton - Queensryche / Soul Bender
  • Chris Traynor - Bush / Gavin Rossdale / Helmet / Blur / Orange 9mm 
  • Jeff Stinco - Simple Plan
  • Brook St James - Tyketto, Steve Augeri, Yellow Brick Road
  • Billy Corgan - Smashing Pumpkins
  • Mike Kerr - Instrumental Guitarist
  • J. Mascis - Dinosaur Jr

 

  Standard Mod™  $295.00  
Includes All Circuitry Mods

Description / Specs:

  • 1 of the top 2 preamps we mod the most!
  • Ideal for small rigs! Light, portable & perfect for 'fly-in' dates
  • All Modifications are exclusive to Voodoo Amps®  
  • Recommended for clean/blues/rock/metal/heavy players – this is a very versatile modification
  • Remove the fuzzy/buzzy characteristics in favor or of gain that is more articulate/defined/clear 
  • Clean tones are improved - More airy/chimey/open sounding 
  • Increased or added headroom on clean patches
  • Balance out all the frequencies so the preamp is more even sounding as well as responsive
  • Improve the harmonic structure so harmonics leap off from the fretboard with ease
  • Restructure the midrange so it feels more like a tube head
  • We tighten up the bottom end so it's not loose/tubby/woofy
  • EQ section is be more flexible and musical sounding allowing for unlimited tonal possibilities
  • Lower background noise/noise floor
  • You can get more of a cranked tone at lower volumes as well as improved sustain
  • The preamp will be able to cut through the mix a lot better both in a recording studio as well as live
  • We recommend tubing the preamp when the unit it Modded
  • (1) Tested / Selected 12AX7EH ($11.95) - Gain channels
  • (1) Tested / Selected 12AX7WA ($10.95) or 12AX7WXT+ ($18.95) - Clean channels
  • All features and functions will continue to operate the same.
  • No holes are drilled / unit will look stock on the outside
  • We do not modify the FX-Loop or the switching system
  • Voodoo Add-On™ controls are not available for this model 
  • Note - The Power Amp will effect your tone so be sure to use a good quality power amp
  • JMP-1 FAQ's 
  • New Voodoo Programmed Patches - Patch numbers #92 - #99
  • Marshall JMP-1 Owners Manual 
  • Voodoo Mods™ retain your amps resale value verses decreasing it
  • Check out our Marshall  EL34 100/100 Upgrades!  
  • Estimated Turn Around Times

 

  Deluxe Mod™  $345.00  
Standard Mod + CapJob = Deluxe Mod

Description/Specs:

  • Includes Voodoo Standard Mod™
  • Recapping / replacing filter capacitors in B+ / main power supply
  • Voodoo Amps Designed™  noise-reduction Modification
  • Improved / restored bottom end
  • Improved playability
  • Increased touch response 
  • Reduced noise &  hum
  • Recommended for all units 10 years old or older
  • JMP-1 FAQ's 
  • Check out our Marshall  EL34 100/100 Upgrades!
  • Estimated Turn Around Times

 

  Platinum Mod™  $604.00  
Standard Mod + CapJob + Power Transformer = Platinum Mod

Description / Specs:

  • New as of 06-01-10
  • Includes Deluxe Mod™ (see above)
  • Includes Upgraded Mercury Magnetics VA-JMP1-P Voodoo-Designed™ Power Transformer
  • $229.00 & $30.00 Installation fee (included)  
  • 120V 60Hz Operation
  • Superior performance & reliability over stock unit
  • Improved power regulation
  • Greatly reduced noise and hum! 
  • Greatly improved feel & tone 
  • Smoother feel & easier to play
  • Richer harmonics!
  • A must for touring musicians, engineers and producers!
  • Platinum Mod™ will give you the best tone, feel and performance
  • Estimated Turn Around Times
  • JMP-1 FAQ's 
  • Transformer FAQ's 
  • Voodoo Amps® World AC Voltage Guide

 

  Platinum Mod™  $604.00  International Customers!
Standard Mod + CapJob + Power Transformer = Platinum Mod

Description / Specs:

  • No need for step-up transformers that can harm your amp!
  • Includes Deluxe Mod™ (see above)
  • Includes Upgraded Mercury Magnetics VA-JMP1-PE Voodoo-Designed™ Power Transformer
  • $229.00 & $30.00 Installation fee (included) 
  • Choose your voltage - 100V, 220V, 230V & 240V!
  • Superior performance & reliability
  • Improved power regulation
  • Greatly reduced noise and hum! 
  • Greatly improved feel & tone 
  • Smoother feel & easier to play
  • Richer harmonics!
  • A must for touring musicians, engineers and producers!
  • Platinum Mod™ will give you the best tone, feel and performance  
  • Save money! Buy from Ebay USA, have it shipped directly to us & we will ship it you!
  • Save money on shipping! We offer several shipping options, please Email us for an estimate!
  • Estimated Turn Around Times
  • JMP-1 FAQ's 
  • Transformer FAQ's 
  • Voodoo Amps® World AC Voltage Guide

 

  Upgrade from Deluxe to Platinum Mod™  $249.00  Introductory Offer!

  • Upgrade from the Deluxe Mod to the Platinum Mod Now!  
  • Includes Upgraded Mercury Magnetics VA-JMP1-PE Voodoo-Designed™ Power Transformer
  • $219.00 & $25.00 Installation fee (included) 
  • Note - free shipping does not apply

 

  Copy Your Settings Service  $20.00  - Keep your presets & settings!

  • What is this? - By using system exclusive MIDI code, we can dump / back up all your patches & mapping settings into our JMP-1 for safe keeping while your unit is at our shop / being worked on.
  • How is this achieved? - We midi dump all data / presets from your Jump-1 unit into our JMP-1. Once all work is completed we the midi dump from our JMP-1 unit back into your JMP-1.
  • Why do I need this? - Modding, servicing and/or repairing a JMP-1 can result in potential software & switching glitches. To resolve these issues a factory reset must be performed restoring the unit to its stock factory presets. In order to save your patch & mapping settings a Midi Dump needs to performed.
  • Important - Please list "Midi Dump" in the notes section of the Mod-Form If you wish to save your data/presets.
  • Note - We do not keep midi backups on file.

 

 Mod-Form  /  Mod Process & FAQ's  /  Packing & Shipping  /  Reviews  /  Contact

"Get inspired - upgrade your tone now!" 


 

 

Voodoo Amps® is the Leader in Tube Amp Mods & Upgrades

Pricing, features & specifications subject to change without notice

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 "We have countless Mods that we have designed & will be adding them to the site daily!"

If you do not see your amp listed here please call (607-256-0465) or email us!  

 

 

Customer Feedback  "I can totally see why so many pro guitarists use the Voodoo Modded Marshall JMP 1, this preamp rocks! I've used it to record with as well as to gig with and the improvements over the stock tones are incredible. The cleans are much more useable, I can hear everything and it's super easy to play on!" - Wayne Gorden, CA

Customer Feedback  "I can honestly say that after the Deluxe Mod my JMP-1 preamp is my favorite piece of gear and I have over $15,000 worth of various guitar preamps. Do yourself a favor and Mod it."  - Andy Matthews, UK

Customer Feedback  "The cleans in my opinion are very usable as long as you keep the gain under 12 or so out of 20. Increase the gain a little and you can get light break up to blues. Of the OD channels I love OD1 for rythms you can dial in just about any Marshall sound. I usually never have to max the gain out. It also can do blues. It seems to also work well with a clean boost. The OD2 can go do modern style distortion and leads with no problems. I am mainly a rythem player and the OD1 is where it is at for me. I was gassing for a Splawn but I like this set up so well that the gas has passed. With this set up I get great tone at all volumes." - MrHiwatt, Harmony Central Reviews

Customer Feedback  "The versatility of the JMP1 is what I loved the most because I use the midi feature all the time. What I didn't like was the complete lack of clean tones and the blurry gain. Voodoo Amps turned it into a true tone machine and it feels more like a head than a preamp. I went with the Deluxe Mod and all my friends that have heard it can't believe the difference. Pure love in a box!!!" - John Davies, TX

 

 

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