Marshall JMP Model 2104 Master Volume 50-Watt 2x12 Combo 1979 - Fully Serviced w/ Original Celestion G12-65 T3120 SpeakersCondition: Excellent/ Very Good

Up for sale a 1979 Marshall JMP Model 2104 Master Volume 50-Watt 2x12" combo. This is the highly sought-after, legendary late-70s Master Volume circuit that defined the sound of classic rock and heavy metal, built just before Marshall transitioned to the JCM800 badge.

Chassis Serial number ends in factory date code "L", officially verifying its 1979 UK production date.

Powered by its completely original pair of 1979 Rola Celestion G12-65 (Model T3120) drivers with the iconic gold Jim Marshall Products labels.

Speaker Date Codes: Stamped "LM13" (December 1979).

Freshly Fully Serviced (2026): The amp has just been meticulously benchmarked and safety-checked by a professional technician. Recapped for Safety. Brand-new modern replacement filter capacitors have been installed to guarantee optimal power delivery, a low noise floor, and safety for the original transformers.The circuit remains structurally pristine, fully operational, and completely ready for the stage or studio.

Shipping & Handover: Located in Ireland. Due to the vintage rarity and heavy weight of this 2x12 combo (approx. 30kg), local collection is highly welcome. International shipping to the UK and Europe can be arranged at the buyer's expense.

This item is sold As-Described

This item is sold As-Described and cannot be returned unless it arrives in a condition different from how it was described or photographed. Items must be returned in original, as-shipped condition with all original packaging.Learn More.

Listed13 days ago
ConditionVery Good (Used)
Very Good items may show a few slight marks or scratches but are fully functional and in overall great shape.Learn more
Brand
Model
  • JMP 2104 Master Volume Lead 50-Watt 2x12" Guitar Combo
Finish
  • Black tolex/ Gold faceplate
Categories
Year
  • 1979
Made In
  • United Kingdom
Number of Inputs
  • 2 Inputs
Power Tube Type
  • EL34
Speaker Configuration
  • 2x12"
Electronics
  • Tube
Direct Output
  • No Direct Output
Reverb
  • None
Color Family
  • Black
Number of Channels
  • 1 Channel
Output Power (Watts)
  • 50

Product safety information may be available here.

JK Bass

Claremorris, Ireland
Joined Reverb:2026

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