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1966 Marshall Super Tremolo JTM 45 MK IV Bluesbreaker 2x12 Combo Tube Amp #31769

Availability: In stock




BRAND: Marshall 

MODEL: JTM 45 MK IV 2x12 "Bluesbreaker" Combo

FUNCTION: 2x12" Combo Tube Guitar Amplifier

PRODUCT DESCRIPTION: This listing is for a vintage 1966 Marshall JTM 45 MK IV 2x12 "Bluesbreaker" Combo Guitar Amplifier.

Considered one of the most sought-after Marshall models of all time! 


  • Super Tremolo Amplifier - Serial #7272
  • 2 - 20 Watt / 75hz Celestion G12M speakers, #P31 1777, "Thames Ditton Surrey" Pre-Rola Greenbacks
  • Tubes, from left to right
    • Mullard GZ34
    • Marshall ECC83 VLVE-00047 36/05
    • KT66 7216 Z
    • KT66 7216 Z
    • Mullard ECC83
    • Mullard ECC83
    • Mullard ECC83

ACCESSORIES INCLUDED: This item includes a foot switch, and does not include any additional accessories.

PHYSICAL CONDITION: Very Good - The grille cloth, logo plate, knobs, switches, connections, and handle are all rock-solid. There are several light cuts in the tolex. There are two cracks in the plexiglass top control panel cover, and the material under has faded.

There is moderate to heavy oxidation on the back panel screws. There are heavy scratches on the handle housing covers, and the metal vents have moderate bends in them that do not affect function. Overall, this amp is in very good condition.

The grille cloth appears to be in very good condition with not a single tear, which leads us to suspect that it might not be original. But it does show wear consistent with some degree of age, so it may have been re-done decades ago, but just not original to 1966. Please see close-up photo above to determine yourself.  

WORKING CONDITION: Excellent - Legendary vintage amps like these are rarely found to be in this good of condition. Every knob works effortlessly and without scratchy or noisy occurrences.

The inputs are all solid and could not work better. Pristine in every sense. The tremolo is spectacular, the gain is incredible, and the sound is glorious. Overall, the working condition of this beautiful amp is excellent!!

We have taken extensive photos of the amp, if you need specific shots, please email us what you need and we will provide it. 



SHIPPING: Please message us with your postal code and we'll get back to you with the best pricing and delivery options that we can find. If there is a price listed above for shipping, it is an estimate only and the actual shipping costs might actually be more or less, depending on service options and your location.

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