Marshall 50th Anniversary JMP1 Specs

The Marshall JMP1 50th Anniversary is a Limited Edition 1w valve amp based on Marshall’s JMP series amps and includes just Volume, Bass and Treble (still no master volume in sight!)

There is a gain boost switch on back of the amp and a 1w/0.1w switch means you can get ear splitting gain at a volume that won’t disturb the neighbours!

This combo version features a 10″ Celestion Speaker and alternative speaker outputs

Featuring a tone that has more gain than the previous JTM1 along with its own unique preamp structure and rear panel gain boost switch, the JMP1 is ideal for everything from big rhythm to searing lead for fans of 1970’s rock.

Although each of the five amplifiers within the 50th Anniversary One Watt range are unique, the series also have some common features; they are all made with pride at our UK factory, and will only be so during 2012 making these amplifiers limited edition. Each model will be available as both a one watt combo incorporating an 8″ or 10″ Celestion speaker (varying from model to model), and a one watt head. Other common features include 8 and 16 ohm speaker outputs on the heads and combos, era correct cosmetic details, a commemorative rear panel plaque, and a unique low power switch on each of the units’ rear panels, allowing you to instantly take the power from 1 watt to 0.1 watt for the ultimate Marshall bedroom volume

  • 2 x ECC83 preamp valves, 2 x ECC81 power valve
  • Volume, Bass and Treble Controls
  • Authentic Red Power Indicator Light and Vintage Power Switch
  • Era Correct Cosmetics
  • Rear Panel Gain Boost Switch
  • 8 & 16 Ohm Speaker Outputs
  • 10″ Celestion Speaker (combo)
  • Power Switch (1w > 0.1w)
  • Commemorative Rear Panel Plaque
  • Available March 2012

2 thoughts on “Marshall 50th Anniversary JMP1 Specs

  1. “still no master volume in sight!” Is that a joke? Why would you want a master volume when you have a .01 watt switch? If you used a master volume you wouldn’t be able to hear the amp over the sound from the strings.

    • Hi,

      Thanks for your comment.

      No it’s not a joke, but I think you’ve misunderstood what is meant. I’m glad there’s no master volume, and I was highlighting the fact that unlike a lot of modern amps, it’s great to see these 1 watters haven’t got a master volume. Of course with the 0.1w switch they hardly need one either, but with some manufacturers, that wouldn’t have stopped them putting one on there.



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