Marshall JMP-1 Preamp

Good Times with the Marshall JMP-1 Preamp
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Hi, my name is Michael Nielsen. I'm a composer/producer. I write music for movie trailers, video game soundtracks, commercials, movies and tv shows. This channel is dedicated to guitar related gear and music production. My production and publishing company is called Ninja Tracks. My guitar sound design is available for Kemper, TwoNotes, THU Overloud, IK ToneX, and IR's.

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BHS Iconic Tones Vol1: Hair Metal for Overloud THU:

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#BigHairyGuitars #Marshall #JMP-1

[BigHairyGuitars]

This is the JMP-1 setting I was using.

Output 10
Vol 13
Gain 16
Bass 6
Middle 0
Treble 2
Presence 0
OD1

When I used the VHT, it was Volume 9:00, Presence 11:00, Depth 11:00

[johnzoccomusic]

They were in the Leppard racks until we switched to the AxeFx 3 in early 2018. Phil’s signal chain was JMP into AxeFx 2 direct to FOH. Phil’s were stock, Viv’s were modded by Trace at Voodoo. Great units!

[simonmastromatteo]

Oooh the shred at the intro... this is so Def Leppard

[marshall]

I have had a JMP-1 on and off since they first came out. I think a lot of guys had them modded because they didn't know some of the secrets or how to use them correctly. Here are a few that I have realized over the years, BTW I always got complements on my tone when using one. Still have one and is still my go to for anything live.
1) Set the Output volume knob to only around 2-4, 8 Am to 10 AM.
2) Use the internal digitally controlled CH volumes to adjust the overall volume of the preamp and the Output for just minor volume tweaks.
3) Higher Ch volumes and lower gain settings work better.
4) OD2 and the bass shift are pretty much useless stick to OD1 for gain tones.
5) Although not a true fully tube preamp, the two tubes in the preamp do make a difference in tone. One tube does the clean CHs and the other the OD CHs. Experiment with different tubes for the best tone. I like a Mullard for the cleans and a JJ for the gain.
6) The power amp you use with the JMP-1 makes a BIG difference- I highly recommend a Marshall with EL34s. For more vintage tone use a 1987X, for more modern tones use a DSL.
7) Don't think this is a high gain preamp, clean to moderate gain levels is what this thing does the best.
7) One of the biggest secrets: Follow the JMP-1 with a BBE Sonic Maximizer with it's knobs set at about 1 O'clock. The BBE will pull down some of the honky mids and make this preamp a monster.

[RobertBakerGuitar]

You've had this thing this entire time!!! I feel like our entire friendship has been a lie!

[LeonTodd]

Hearing the demo at the start I thought "that sounds way better than mine ever did, he's probably getting some extra flavour from the VHT". But it's DIRECT!

[AngusClarkGTR]

That, the marshall 2x50 Watt power amp, a PCM70, and a 2x12 cab was my rig for all three years I spent touring with Kitaro (‘94-97). The whole “An Enchanted Evening” album and video were done with it. We got a Grammy nomination so I figure I got my money’s worth. Thanks for demo-ing it!

[spark]

I got my jmp1 in 2015 for like $200. It's flawless 😍 i also run the 9100 dual monoblock power amp and rare jfx1 with it. Long live the rack 🤘

[tommygunrva]

That "honk" in the mids is the signature, and it is wonderful! That preamp was a goosed up digital version of the JMP head. That's why if you go: [ OD1 / Gain-15 / Bass-6 / Mid-2 / Hi-0 / Pres-2 ], you get "Back In Black-era" Angus Young. That mid-range honk is part of the original JMP SLP sound. The clean channel as well. While OD2 gets into more Lee Jackson/Jose Arrendondo-modded 2203 territory in regards to gain and low end. I've had a few of these in the studio over the years. They always sound spectacular. They are super hard to find though. If you ask certain folks at Marshall, they'll tell you Big Billy Gibbons bought them all from the warehouse when Marshall took them off the retail market. That could be urban legend though.

[JulianMerghart]

A lot of rookies are just finding out about rack preamps. While they do have their place - things can start to get very expensive. I am convinced that feedback (the magic electrical interference that defines rock and roll) can be compromised when the preamp and power amp live in separate spaces. Of course, it still happens, but a Marshall head has one specific place where everything comes together and I can appreciate that. I am one the fence with preamps and I have a bunch of them. For touring? Always a good thing. For direct recording they pretty much rule too. But I feel like people are trying to increase the value of their preamps with this new preamp YouTube revolution.

[roncarter]

My friend has this unit and uses it with his jcm 800 and it sounds incredible! I was blown away.

[DANTHETUBEMAN]

I played the jmp-1 for 10 years, with the 9200 power amp and four 4/12 cabs it was the best set up I ever had.

[patrickfouhy]

I used to tour with a JMP 1 and a Triaxis. I got pretty experimental with them, but eventually just used them one at time and would switch depending on my mood at the gig. The trick with the JMP is that it REALLY needs something like a tube screamer in front of it if you're going to use OD2 channels. Also, I found that the voicings of the 2:90 power amp really complimented the JMP nicely as well.

[stankowalski]

I remember reading somewhere that the JMP-1 was basically analog solid state distortion, and that the tubes were included simply for marketing purposes. Don't know how accurate that is, but this JMP-1 sounds really good. Wish Marshall would re-issue this or even an updated version. Good tones.

[noworries]

still LOVE mine after 29 years, especially the OD1 ch!

[FuzzWoof]

I toured with two of these in a big fridge rack with the matching 50/50 power amps back in the 90's and absolutely loved them. Recorded direct with them all the time in the studio and was always pleased with the results. Pain in the butt to make quick adjustments on stage though! I'd love to grab another one and see how it sounds direct put it through a modern IR power amp/cab plugin.

[eduardwilliams]

One of the best tones I ever pulled was this preamp into one side of the gold el34 dual mono block 50/50 poweramp. I was playing the palais in Melbourne (lovely old theatre) and I was in tone heaven all night. Standard 1960a cabinet and a les paul.

[lucasiciliano]

Hi
Michael ! Awesome vid ! I really apprecciate it because of I'm a JMP-1 aficionado since I bought in the last '90, My Father and me ever loved Marshall tone and this is the most versatile preamp in the market, I mean active EQ, series/parallel loop, Di/cab simulator and a lot of useful features ... 4 fabled channels that let's 'U play everithing, it sounds good with any power amp, EL84, EL34(KT77), 6L6(KT66), 6V6, 6550(KT88), LIVE & Studio ! JMP-1, My number one ! 👍

[JavyonVISION]

I love my JMP1! (Run it with EL34 100/100 dual monoblock power amp) Runs two full stacks nicely.🤪

[AnAmericanGuitarist]

I bought a JMP-1 new and used it for around 2 decades with a Marshall Dual Mono block 9200 power amp in the rack. The 9200 has 5881 power tubes. I always hoped for newer versions of the JMP-1 (Maybe a JMP-2?) because I wanted a little more gain out of it, but at loud gigs when the 9200 was bringing things up to a respectable volume the whole rig just fattened up nicely.