🔥 1972 Marshall 50W Bass Head (Super Rare) – Vintage UK Tube Amp 🔥


If you’ve been waiting for one of these… don’t hesitate. These do NOT come up often, and when they’re gone—they’re gone.


Up for sale is an extremely rare early-1970s Marshall 50-watt “bass spec” head, believed to be from 1972, based on internal construction, tag board, and transformer codes.


These bass versions are highly sought after for their thicker low-end response, smoother breakup, and killer guitar tones—a true sleeper in the Marshall lineup.


🧠 What This Likely Is

This appears to be a Marshall Model 1986 (50W Bass) or a closely related JMP-era variant.

Point-to-point / tag board wiring

  • Dual EL34 output section
  • Classic Drake transformers (784-139 visible)
  • ECC83 preamp section
  • UK-made, handwired construction


🎸 Tone & Character

These amps are known for:

  • Warmer, rounder low end vs lead spec
  • Smoother, less aggressive top-end
  • Excellent pedal platform
  • Earlier, more musical breakup


Many players actually prefer bass-spec Marshalls for guitar use.


🧾 Condition (PLEASE READ CAREFULLY)

This is a 50+ year old vintage amplifier.

  • Fully intact vintage chassis with original-style wiring
  • Internal components appear period-correct, but no claim is made regarding originality
  • Transformers appear to be original Marshall-era units
  • Marshall logo on front is a replacement
  • General cosmetic wear consistent with age
  • Oxidation, aging, and patina throughout
  • Sold exactly as shown

👉 PLEASE REVIEW ALL PHOTOS CAREFULLY — they form part of the description and are the best representation of condition.


⚠️ IMPORTANT DISCLAIMERS

This is vintage tube equipment and is sold as-is.

  • No guarantees on remaining lifespan of tubes, capacitors, transformers, or internal components
  • May require servicing, biasing, or maintenance depending on your expectations
  • No returns for age-related wear, noise, component drift, or service needs
  • Photos are provided for reference, but may not capture all details or past service work
  • Not a modern reissue — this is true vintage gear with all associated characteristics

⚠️ Originality / Modifications Disclaimer (IMPORTANT)

This is a 50+ year old vintage amplifier. I am not representing this unit as 100% original or unmodified.

  • Components may have been replaced, serviced, or modified at any point in its lifetime
  • I have not performed a component-by-component verification
  • Any non-original parts, repairs, or circuit changes may or may not be present
  • The amp is being sold based on visible inspection only


👉 No claims are made regarding originality, service history, or internal component correctness.


👉 Tubes are provided as-is and should be considered consumable items. Buyer assumes responsibility for any tube replacement or servicing.


👉 No guarantees are made against tube failure, noise, microphonics, or damage occurring during shipping.


👉 Buyer acknowledges that vintage equipment commonly contains serviced or replaced components and accepts this as part of the purchase.


📦 What’s Included

  • Marshall 50W head
  • Attached power cable

💬 Final Word

These early bass-spec Marshalls are getting harder and harder to find, especially in this kind of condition.


If you know what this is—you already know.


👉 Don’t miss it. Someone else will.

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 hours ago
ConditionGood (Used)
Good condition items function properly but may exhibit some wear and tear.Learn more
Brand
Model
  • JMP 1986 Bass 2-Channel 50-Watt Guitar / Bass Amp Head
Categories
Year
  • 1972
Made In
  • United Kingdom
Electronics
  • Tube
Reverb
  • None
Color Family
  • Black
Output Power (Watts)
  • 50

Product safety information may be available here.

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Joined Reverb:2024

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