I have a lot of requests for parts and information for the Marshall JMP-1. To keep things simple and straight-forward, I've therefore decided to make dedicated Marshall JMP-1 category in my on-line store.
I don't offer original Marshall spares as they're obsolete and therefore impossible to procure. My new Marshall JMP-1 category in my on-line store however, does comprise some goodies which are either very close to the original items or 'smarter', if you know what I mean. My performance knob and bezel set which bears a close resemblance to the originals, is for example, offered alongside a 'studio' knob and bezel set which looks very cool.
![Marshall JMP-1 Knobs Nuts and Bezels](https://plasmamusic.com/wp-content/uploads/2021/01/Knobs-Nuts-Bezels-Compared.jpg)
I've developed things like Eclipse which fixes the annoying skipping of the data encoder as these things are getting rather old now. What am I saying? Marshall didn't do this properly in the first place! 🙁
![Eclipse Bounce Eliminator for the Marshall JMP-1](https://plasmamusic.com/wp-content/uploads/2023/07/Eclipse-Kit-2.jpg)
And then there's my PML-TX01 replacement transformer for the Marshall JMP-1. Comprising laminates that are made from a different (more expensive) material than was used in the original, my transformer runs cooler and will theoretically live a lot longer. I even managed to get this made in the same factory that made the original Dagnall TXMA-00014.
![A replacement transformer for the Marshall JMP-1, my very quiet PML-TX01](https://plasmamusic.com/wp-content/uploads/2021/09/PML-TX01-3.jpg)
Recently, I finished designed my RE-JMP-1 replacement rack-ears for the Marshall JMP-1 and my first batch have just been delivered. I'm really happy with these.
![RE-JMP-1 Rack-Ears for the Marshall JMP-1](https://plasmamusic.com/wp-content/uploads/2024/02/RE-JMP-1-Rack-Ears-for-the-Marshall-JMP-1.jpg)
I've also got together a screw kit for the Marshall JMP-1 which I hope, will help out a few JMP-1 die-hards.
![A complete set of screws for the Marshall JMP-1](https://plasmamusic.com/wp-content/uploads/2024/02/Screw-kit-for-the-Marshall-JMP-1-4.jpg)
There's also a top-secret JMP-1 project under development which I'm busting to share with but... well, just check in regularly!
I often get asked to modify equipment with a view to changing the sound and indeed the Marshall JMP-1 is no exception, with requests to do so, being received on a semi-regular basis. My response is always the same...
"If you don't like the sound, buy something you do like the sound of."
Yes, I know what you're thinking...
"How can you say that Alex, when you make so much stuff?"
Well, take a closer look, guys. All the peripherals I design and manufacture, have two objectives in mind:
- To improve reliability
- To increase longevity
It's that simple and nothing I offer, changes the sound of the equipment we all love.
Yes, there are exceptions. My modular switched-mode power supplies like Aurora, Supernova and Galaxy for example, inadvertently remove transformer generated hum and power supply induced noise. Nebula was designed to give the Roland MKS-70, balanced outputs but it also (and inadvertently) improves fidelity. Hey but they're all good things, right? 🙂
UPDATE - 10th April 2024
So when I posted this article, I mentioned a 'top secret' project. Well here it is, everyone!
Oracle JMP-1 is my latest upgrade for our favourite MIDI valve pre-amp. It eliminates the requirement for a battery to back up the memory. You can read all about here.
UPDATE - 18th June 2024
Another "at last", replacement output level selector switches for the emulated and master outputs, are now available. Read all about them here.