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God’s Gift to Rock: A Late ’70s Marshall JMP 100 Watt
Hi my rockin' friend.
Sorry, you have to register to see me do this one!
If you have already registered, please login.
Cheers, SD
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about 1 year ago
Ok, I was searching about post and pre phase inverter master volume mod and I remembered that Phil has this Marshall with some mods. This amp is a JMP 2203 so the master knob is a Pre phase inverter master volume so the extra knob that it is i the far right side should be a post phase inverter master volume mod. That means that you can push harder the gain section with the master knob and the power section with the extra knob at pretty low volume.
Phil is it possible to check it?
If I am right it would be very interesting to compare how those knobs function together in comparison with a attenuator..
The point is that if the knobs will work well then there is no need for a attenuator..
about 1 year ago
Hey Fil! I got my granpa’s amp here in my house. It’s 100 watt JMP Super Lead. The thing is, is it posible to record with this amp via Garage Band software? And if it is, can you tell me how? Greetings from Mexico
-Elias
about 1 year ago
Hello Elias, are you the “Gewerh44″ from youtube?
A granpa with a 100 watt JMP must be a very cool granpa
You can record the amp with a microphone at the cabinet. And I think there’s also a solution for recording the amp directly with some type of adaptor box between the amp and the cabinet. But I would go for the microphone solution. Maybe you even know this, but if you have just the amp and no cabinet for it, dont turn in on wihout a cabinet connected. Could make damge to the output stage.
about 1 year ago
Hey! No, I’m not

And yes he’s a really cool one
Thank you so much for the info man! I’ll maybe go for the microphone option
Rock On lml
about 1 year ago
Hey Fil, The Amp in the link looks very similar to the one at the top of this page, however could you tell me the difference between the two, as the one in the link is what I saw AC/DC using live at Donnington 2010. http://www.google.co.uk/imgres?imgurl=http://storage.lauda-audio.pl/dynamic_image/a742/ff4b/96c4/c3a7/676b/be7c/3720/e4d1/w840_h490_mr_bffffff.jpg&imgrefurl=http://www.lauda-audio.pl/instrumenty/produkt/3365/marshall/1959-slp-plexi.html&usg=__uvR4XkiCYnjyLECkQjdNWN5a1l0=&h=490&w=840&sz=114&hl=en&start=84&zoom=1&tbnid=vWKlYQo_ISoyFM:&tbnh=84&tbnw=144&prev=/images%3Fq%3D1959%2Bslp%26um%3D1%26hl%3Den%26rlz%3D1T4ADFA_enGB340GB340%26biw%3D1135%26bih%3D510%26tbs%3Disch:10%2C2226&um=1&itbs=1&iact=hc&vpx=247&vpy=94&dur=2010&hovh=171&hovw=294&tx=175&ty=85&ei=4MbGTN_wH8K4jAec7f1M&oei=1sbGTK-SCoyVOqDk_RI&esq=4&page=6&ndsp=17&ved=1t:429,r:12,s:84&biw=1135&bih=510 sorry about the long link.
about 1 year ago
I believe the one in my link is the 1959 SLP 100W, not sure if this has master volume or not
about 1 year ago
Correct, but it’s a reissue. They did use these on the BI tour, although they were tucked away under the stage. The two heads on stage are a JTM45/100 and an old Superbass.
about 1 year ago
Cool, See from a distance hard to tell, I got some pictures of the amps on stage looked like 59SLP,s however taking a look at the JTM45/100 on google, it looks like a 59SLP its self so could be mistaken for one, thanks for the info.
about 1 year ago
did read they bought a load of reissue 59′s pre the BI tour and some JTM 45′s, but it said the 45 was under the stage, and the 59′s were up on stage. Different websites give variations of information, be great to have a conversation with one of the guitar/amp tech guys for AC/DC
about 1 year ago
Do you have a link for those pics?
about 1 year ago
If you have facebook, I can send them to you in a private message, Im not saying they are deffinatley 59SLPs but they looked them. But I will be happy to message the picture to you
about 1 year ago
No sorry. Damn.
Would of loved to of seen those pictures.
about 1 year ago
I see 5 pre-amp valves here! Of which one looks like its for a tube buffered fx loop, but still even a stock cascaded 3x pre-amp tube plexi, it rocks! There must be insane amounts of gain on this beast. Probably something like what Slash and George Lynch might have used back in the day. Would like to hear it.
about 1 year ago
Its a very great amp and its in a very good condition. Mine looks like it was on tour all the time. Lots of small bumps, Marshall logo in infamous “nicotine yellow” color, 2 knob caps missing.
However, that all doesnt matter. Not even a small bit. Its only 9 years younger than me. I love it and I just feel like you.
Actually, I should do my damn work now but have to look always to the left where the JMP and the cab stands
about 1 year ago
Looks wise I tend to like the battered ones like the one you have, Franz. With the yellowed plastics and all. I find it necessary to work well and generally look “whole”; so the knobs I would put (those two missing ones, either original or replica wouldn’t matter to me; my vintage guitars – for example – are filled with replica parts).
Like you said Franz, these are pieces of Rock History. I am looking forward for your pictures. All our pictures – of our JMPs – I will collect and create a post about them possibly with sound files.
about 1 year ago
Yeah, already found some replica knobs at my dealer, will order them together with the microphone later.
about 1 year ago
BTW I’m in the middle of a meeting right now, 6 people. I don’t give a damn about it…. I’m only listening (and talking) with half brain; my other half is here!!!
about 1 year ago
Hehe, welcome to the club, same here. Have to convert a large Oracle database here for a customer and can’t concentrate on it. Fortunately, its only a test project.
Maybe its time for lunch break and a bit of playing now
about 1 year ago
haha! this has definitely come to be a “get-a-way” for a lot of us. I love it.
about 1 year ago
Just curius, when you say ”Late 70s JMP”, which years do you begin at when you refer to ”late 70s”, is it 75´or 76´?
about 1 year ago
I should say mid to late ’70s: 76, 77, 78, 79 and probably, ’80.
about 1 year ago
Hi Fil,
Greatings from Sydney,Australia,the home of AC/DC!
This is G6131MY from the Marshall amp forum.I think you posted on my thread a few days ago.I just joined your site.Looks great.
As I said I was after Malcolm’s tone on Long way to the top.I am considering buying the Metroamp super bass 10000 series to go with my Malcolm Sig Gretsch.I notice you have just purchased a Metroamp.What type is it and what do you think of it?
Regards,
Super Bass
about 1 year ago
Hi Mate, Welcome!!! Glad you’re here.
Yes, I own a Metro JTM. I LOVE that amp. Did you see a few of the metro “sessions” here? Just search (here) metro session”. I have one clip recorded with my Gretsch, though that one I posted it with the video camera audio take directly. The character remains the same.
about 1 year ago
Hey fil!
whats the price of a metro JTM? id like to know cause one day maybe i will buy one!
they produce and cabinets, or just heads?
Thanks, Billy
about 1 year ago
I’m not sure if anyone has mentioned this before, but in the book “AC/DC Maximum Rock & Roll” there is an interesting picture relating to Angus and Malcolm’s gear. In one of the pictures it shows Malcolm in August 1999 at Warehouse Studios in Vancouver. While I see there is an MK II and JMP head, I also noticed two heads with the brand name of “ARD”. I’ve been reading these forums since the beginning and couldn’t remember if anyone had ever mentioned this brand before.
about 1 year ago
Hi there, no, it hasn’t been mentioned. ARD amps are Canadian made by their same, own amp tech. He builds them. It’s basically the design of an old ’68 Marshall
about 1 year ago
Thanks, that’s interesting! On another note, I think you should take a listen to an Australian band called, Airbourne; they’re currently the closet thing to AC/DC I’ve heard on the music scene.
about 1 year ago
I know Airbourne! BUT. I think their skill is nowhere it was for AC/DC even when they started. Guitars are not happening yet. The band groove is cool – I like it – but as far as fascinating guitar parts… still to develop
about 1 year ago
You took the words right out of my mouth. It’s still good to hear a ROCK group influenced by AC/DC in an American music culture that is run by Hip-Hop and Rap. I don’t know how it is over in Italy… I’m guessing Andrea Bocelli and techno music! haha
about 1 year ago
I agree, I saw Airbourne live earlier this year and i have to say they are on the right track. The skill is definitely not up to par with ac/dc but these guys know how to rock and they do it as best as they can. It was great to see another solid rock and roll band.
about 1 year ago
Yeah, theyre not as “refined” (thats a terrible word, but I cant this of one better) and they just wanna rock!
about 1 year ago
Wizard amps, made my Rick St. Pierre.
http://www.wizardamplification.com
about 1 year ago
Oh my… how many guitars do you have?! that’s insane! people say i have too many guitars and i only have 3!
Hey Fil, Ive got a question for you. My amp has the wrost ground fuzz ever. i have no idea how to get rid of it. I can only hear it when i have the distortion on. But when its on the clean channel its so nice and clear.
about 1 year ago
Uhhh… sound aside that photo of your guitar rack boggles my mind. I was envious for about ten seconds until my wife looked over my shoulder then looked around my room and said, “At least you’re not a crazy as that guy.” Crazy, driven, rich – who cares. Fil, my friend, you have a life many may desire but few have the dedication to manifest.
I stand in awe of your powers oh exhalted one.
about 1 year ago
Our wives would agree on what yours told you… my wife sees me as “nuts”, too. And I am for certain, in a way. It’s been oh such a long time, such a loOoong time that I had wanted all of this. Been working on this, for this, for such a loOoong time (sings it). Heh. Thank you friend. Maybe you can understand me
(as most here at solodallas.net!)
about 1 year ago
I checked my cd’s and I found out that in the Powerage album (the remasters series), inside the booklet there are live photos where the amps are JMP MKII Master volume. Check the pages 10, 12 and the last page of the booklet..
about 1 year ago
Another great confirmation. And then you read the Young brothers saying they weren’t convinced with MVs? Hmm. They used MVs EXTENSIVELY, and it’s plain to hear it live and MAYBE in the studio as well. I will try to look for those pictures online and post them here.
about 1 year ago
I just had to link this video
httpv://www.youtube.com/watch?v=o9Ujm4HEXGc&feature=related
By the way, do you think the amp would have sounded the same as You can hear it if it were stock without any modifications or?
about 1 year ago
And, if someone is interrested in similar mods, any idea WHO can make those mods? Just thought if someone would want an amp like this but make it more practical , for example, bedroom level or be able to play in enviroments where you may not wanna disturb the people around you to much. Just a thought
about 1 year ago
I have no idea about how it would sound without this mod(s). I think it would sound a little worse. Even AC/DC at the time had their amps modded, all the time. I think there is a DVD made by the guy who modded my amp about those kinds of mods. Plus he was very well known – he died years ago – for his mods. Additionally, there are more and more great techs able to mod beautifully Marshall amps.
about 1 year ago
I think it’s got a very strange front panel, don’t you? I mean: The NMV’s don’t use to have “master” and “preamp” pots, just “Volume I” and “Volume II”, like the old version of the 1959 (plexi). I know this amp’s got a mod done on it, with double master vol. switching (and no “double channel” possibilities), but why does this amp’s got a “Master” inscription on it? why 4 inputs originally and no different volumes? is it a 1959 or a 2203? I’ve never seen a 4 inputs’ Marshall with “Master” and “Preamp” pots.
Anyway, it’s good to know you’re happy with it. Can’t wait for sound clips!!
about 1 year ago
Yes I do. I did right from the start. The panel is a MV, no doubt. There wouldn’t be reason for preamp and master otherwise. I am wondering then why the 4 inputs, though? One has been closed. On the other one, that master volume knob has been installed.
Hmmm… seller doesn’t know either, he’s not an amp expert and amp wasn’t his. I have no idea! It sounds very good and I’m liking the modification a lot, too.
I have played it some more today, and I look forward to recording with it
about 1 year ago
BTW I think this is a 2203. Look at the back pane. I’m looking for a good picture of a 2203 on the back and one of a super lead to compare with.
about 1 year ago
look at amparchives.com
about 1 year ago
Done. It’s a MV! The back panel was the giveaway: it should say “super lead”, while when it says “Model 100 watt lead” it is a master volume (the MKII Master writings are lost because of the modification).
George, ROCKER, comments on differences in “tone”? Are you aware of what was different?
about 1 year ago
Yes it is a MV for sure.. I havent played with a JMP MKII 1959/1987 but with older 1959′s. My opinion is that MV is more versatile, you can play with presence/pre gain/master volume knobs in any way to shape your sound where you want it to be. from the other hand NMV’s need to be pushed to the limit to get the desirable tone.. I prefer the MV, is easier to get where I want.. one more factor is that I understand/feel more the gain in my sound.
about 1 year ago
Sent you the pics.
I agree with you. I remember my 1959 – it was a metal face, 1969 – and though I liked it some, I like this one tons better. I think the mod is also a great addition. I have been playing with the tone controls and they have a incredible sweep. Never found on any other amp. I’m talking bass-mids and highs as much as one wants to. Really useful. Will still look out for a late ’70s JMP NMV, to complete the goal. In the meantime, I think this amp could already take me very close if not “there. Now the cabinet or the speakers are the next step. I will try the greenbacks cab tomorrow.
about 1 year ago
I cant wait to hear it my friend..
about 1 year ago
thanks for the photos..and please do me a favor, if you intend to buy a NMV buy one without modes, a clean one. amparchives will help..
about 1 year ago
Understood!
about 1 year ago
Love to hear it too… you play great.
My 77 JMP 1959 SL with mv mod nails the early ACDC that our band plays.
Except we need a bigger PA now!
PS: Where is the “Rocker” vid you did?
about 1 year ago
Will upload it for you, thank you
PS any clips of you playing with that JMP?
about 1 year ago
Yeah, got a few drunken clips on you tube.
http://www.youtube.com/watch?v=YivKSdfj9fA&feature=related
Bear in mind, i was only on 2 for vol on that gig. Bloody LOUD!
about 1 year ago
Ahhh… lovely! That’s pure AC/DC tone right there. What insidw the cabs if I may ask?
about 1 year ago
Cab is a stock 1960TV 25w Greenbacks. I think they sound the best for the stuff we do.
It is surprising how clean Angus plays in his early stuff!
BTW do a search on “MARCUS HOOK ROLL BAND”. The Young bros first album before ACDC!!! If you hadnt already…lol
about 1 year ago
Fantastic. I just played mine with vintage 25w original greenbacks from 1969 and it was heaven on earth. The different cabinet/speakers made a world of difference, even too good and hard to believe. I knew that album!!
about 1 year ago
fil i wanna hear that sound
i cant wait for that :/ want to hear it soon
and, are that all your guitars or do you have some more?^^
about 1 year ago
You will be pleased. I promise.
about 1 year ago
Love to see people happy
Hope to hear the amp soon.
The look of the amp itself just “sounds” like AC/DC (don’t know how to say it otherwise)