Standard, Deluxe, Platinum Mods & Upgrades
Marshall JCM800 4211 Mods 
Standard Mod™ $295.00
Deluxe Mod™ $599.00
Platinum Mod™ $997.00
Platinum Mod™ $997.00 International Customers!
Standard Mod™ $295.00
Circuitry Modifications
Description / Specs:
- All Modifications are exclusive to Voodoo Amps®
- Clean tones are warmer / deeper, Mids are focused & Highs are more airy / chimey
- Improved articulation & touch response
- Increased sustain - Smoother & more liquid like
- Increased Gain / Distortion
- Cranked tones at lower & cranked volume levels
- Improved harmonic structure - harmonics seemingly leap off from the fretboard
- Vibrato & bends feel smoother - You will not have to struggle or fight the amp
- Added bottom end
- Highs are more transparent - Less harshness
- EQ sections are more active, flexible & musical
- Over all frequency response is better balanced / more even sounding
- You will cut through the mix better live & in the recording studio
- All features will function the same - Features are not removed nor disengaged
- We do not offer Modifications or upgrades to the clean channel, reverb or switching circuitry
- Recommended Add-On™ Controls - Bottom™ 1 & 2, Global™, Mid-Slice™ & Mid-Girth™
- All components used are high quality & are chosen for quality of tone, feel & reliability
- Important Modifications do not apply to models manufactured in 1982 & 1983 - Marshall Date Codes
- The 82' & 83' models were not designed the same & have little/no gain by comparison
- Modding these models requires removal of stock circuitry & installation of a custom hand-wired circuit (1 or 2 channels) - Call for details & pricing
- Voodoo Mods™ retain your amps resale value verses decreasing it
Deluxe Mod™ $599.00 
Upgrade to Standard Mod™
Description / Specs:
- Includes Standard Mod™ (see above)
- Includes Upgraded Mercury Magnetics VA-4211-O Voodoo-Designed™ Output Transformer
- $249.00 & $55.00 Installation fee (included)
- Superior tone & reliability over stock output transformer
- Vastly increased sustain - leads are much more liquid like & fluid
- Effortless Pinch / artificial harmonics
- Greatly improved articulation & definition
- Increased / richer bass response
- Increased even-order harmonics (IE: sounds much more musical)
- Massive rhythm tones - when you hit a chord it's there immediately
- Superior quality & performance over stock output transformer
- Increased headroom - holds together better at stage / higher volumes
- Bottom Line - The Deluxe Mod™ will give you the best tone possible
Platinum Mod™ $997.00
Power & Choke Transformer Upgrade to Deluxe Mod™
Description / Specs:
- Includes Deluxe Mod™ (see above)
- Includes Upgraded Mercury Magnetics VA-4211-P Voodoo-Designed™ Power Transformer
- $249.00 & $80.00 Installation fee (included)
- Includes Upgraded Mercury Magnetics VA-4211-C Voodoo-Designed™ Choke
- $49.00 & $20.00 Installation fee (included)
- 120V 60Hz Operation (100V, 220V & 240V also included)
- Superior performance & reliability
- Improved power regulation
- Greatly reduced noise and hum
- Greatly improved feel & tone
- Smoother feel & easier to play
- A must for touring musicians, engineers and producers!
- Platinum Mod™ will give you the best tone, feel and performance
Platinum Mod™ $997.00 International Customers!
Power & Choke Transformer Upgrade to Deluxe Mod™
Description / Specs:
- No need for step-up transformers that can harm your amp!
- Includes Deluxe Mod™ (see above)
- Includes Upgraded Mercury Magnetics VA-4211-P Voodoo-Designed™ Power Transformer
- $249.00 & $80.00 Installation fee (included)
- Includes Upgraded Mercury Magnetics VA-4211-C Voodoo-Designed™ Choke
- $49.00 & $20.00 Installation fee (included)
- Includes 100V, 120V, 220V & 240V AC operation
- Other voltage available upon request
- Superior performance & reliability
- Improved power regulation
- Greatly reduced noise and hum
- Greatly improved feel & tone
- Smoother feel & easier to play
- 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!
"Get inspired - Upgrade your tone now!"
Voodoo Amps® is the Leader in Tube Amp Mods & Upgrades
Pricing, features & specifications subject to change without notice