Marshall JMP MK II 1975 50 watt amp head


Component Visual Breakdown

  • Preamp Section: Three preamp tubes housed beneath aluminum shields on the far left.
  • Power Section: Two vertical EL34 power tubes secured with metal spring retainers.
  • Transformers: The heavy iron power transformer, choke, and output transformer assembly which provide the legendary Marshall bark and raw mid-range drive.
  • Capacitors: Two large blue Dale filter capacitors alongside vintage aluminum canister capacitors providing power filtering.

The "S/A" prefix visible on the back panel panel design signifies a Model 1987 Lead circuit. Because this unit features the classic round plastic voltage/impedance selectors and metal toggle switches rather than the large plastic rocker switches implemented later that year, it dates precisely to early 1976.

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.

Listeda month ago
ConditionGood (Used)
Good condition items function properly but may exhibit some wear and tear.Learn more
Brand
Model
  • JMP 1987 MK II 2-Channel 50-Watt Guitar Amp Head
Finish
  • Black
Categories
Year
  • 1975-76
Made In
  • United Kingdom
Power Tube Type
  • EL34
Number of Channels
  • 2 Channels
Electronics
  • Tube
Direct Output
  • No Direct Output
Number of Inputs
  • 4 Inputs
Impedance
  • 16 ohms
  • 8 ohms
  • 4 ohms
Reverb
  • None
Color Family
  • Black
Output Power (Watts)
  • 50

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Frankie's Studio

Huntingtown, MD, United States
Joined Reverb:2023

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