Standard, Deluxe & Platinum "Classic" Mods & FX-Loop Upgrades
Marshall JCM800 4104 "Classic" Mods
Standard Mod™ $295.00
Deluxe Mod™ $549.00
Platinum Mod™ $967.00
Platinum Mod™ $967.00 International Customers!
Interrupt Fx-Loop Mod™ $99.00
Tube Buffered Fx-Loop Mods™ 1 & 2
"Rich bottom end with a sweet gain-boost - Perfect for Classic Rock & Blues fans!"
Standard Mod™ $295.00
Circuitry Modifications
Description / Specs:
- All Modifications are exclusive to Voodoo Amps®
- Recommended for blues & 70's rock players Increased gain & sustain
- Slightly hotter gain than 70's Rock (3 Gain stages) - "This gain knob goes to 11!"
- Articulate / defined distortion – No fuzzy/buzzy characteristics
- Increased harmonic detail & complexity
- Improved bottom end - Deep, rich bottom end that is tight & fun to play on
- All frequencies are balanced out so the amp is more even sounding over all as well as responsive
- EQ section is much more active, responsive & musical
- Brighter or more warmer tones can be dialed in depending on EQ adjustments
- Retains same classic Marshall midrange & tone
- The amp will be able to cut through the mix a lot better both live as well as in the studio
- Applicable for all JCM800 4104 models (vertical & horizontal inputs)
- Recommended Add-On Controls: Gain Boost Switch (installed in place of low input jack), Bottom™ Control(p/p) Global™ Control, Mid-Boost, Mid-Girth™ Control Pot
- Please list "Classic Mod" in the notes section of the Mod-Form
- Voodoo Mods™ retain your amps resale value verses decreasing it
- Please note: This is a lower gain mod
- Attention Gain-lovers! Our HG-Jose Mod (high gain) is perfect for shred players & fans of Sykes, Lynch, DiMartini, etc
Deluxe Mod™ 5499.00 
Output Transformer Upgrade to Standard Mod™
Description / Specs:
- Includes Standard Mod™ (see above)
- Includes Upgraded Mercury Magnetics VA-4104-O Voodoo-Designed™ Output Transformer
- $199.00 & $55.00 Installation fee (included)
- Increased sustain - leads are smoother
- Greatly improved articulation & definition
- Increased / richer bass response
- Increased even-order harmonics (IE: sounds much more musical)
- Improved touch response - when you hit a chord / note it's there immediately
- Improved headroom (cleans stay cleaner & louder at gigging/stage volumes)
- Bottom Line - The Deluxe Mod™ will give you the best tone possible
Platinum Mod™ $967.00
Power & Choke Transformer Upgrade to Deluxe Mod™
Description / Specs:
- Includes Deluxe Mod™ (see above)
- Includes Upgraded Mercury Magnetics VA-4104-PMV Voodoo-Designed™ Power Transformer
- $269.00 & $80.00 Installation fee (included)
- Includes Upgraded Mercury Magnetics VA-4104-C Voodoo-Designed™ Choke
- $49.00 & $20.00 Installation fee (included)
- 120V, 220V & 240V AC Operation
- 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
- Note - Includes accessory winding for footswitchable Solo-Boost Master Volume!
Platinum Mod™ $967.00 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-4104-PMV Voodoo-Designed™ Power Transformer
- $269.00 & $80.00 Installation fee (included)
- Includes Upgraded Mercury Magnetics VA-4104-C Voodoo-Designed™ Choke
- $49.00 & $20.00 Installation fee (included)
- 120V, 220V & 240V AC Operation
- Other voltages available on 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
- Note - Includes accessory winding for footswitchable Solo-Boost Master Volume!
- 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!
Upgrade to Series FX-Loop Mod™ starting at $99.00! 
- Three (3) Series FX-Loop's to choose from!
- Interrupt FX-Loop No circuitry added
- Voodoo Tube Buffered FX-Loop Highest quality Pro Loop (no level controls)
- Voodoo Tube Buffered FX-Loop XL Highest quality Pro Loop with Send & Return level controls!
- Completely transparent
- Improved tone over parallel loops
- For use with effect pedals & rack mounted units
- Two (2) input jacks on the right can be used for Send & Return Jacks - no drilling required
- Send & Return Level controls are installed on rear of chassis - drilling required
"Get inspired - Upgrade your tone now!"
Voodoo Amps® is the Leader in Tube Amp Mods & Upgrades
Pricing, features & specifications subject to change without notice