1968 Marshall JMP Plexi Demo

Learn more about the amp: www.premierguit...

[@KfirOchaion]

THE sound that i have in my head. Right there.

[@billiejoe1514]

👌🏼👍🏼

[@LennoxBrigade]

Thank you Jim Marshall for all you've done. RIP.

[@TheGearChat]

I cried tears in awe of this sound.

[@Stashmanfpv]

These amps (and most clones - Ceriatone comes too mind) are some of the BEST examples of these amp tones available - PERIOD! This is what made the rock n roll greats, after modding the Bassman, of course, Even my modelers, Fractal, Helix, Kemper, and my new Quad Cortex, deliver these sounds in spades and I always start at the Marshalls and then work my way into the clones such as the Friedman’s etc. which are the “modded” versions of what we all crave... I had the Friedman Small Box 50 head and cab and it was simply glorious, but the COVID bug hit and forced me to part with it and some things I can never afford again. :-(. Thank goodness for my modelers as I was able to “capture” those tones before letting those amps go and even though they sound spot on, there’s still something about a live rig, pushing air, that nothing can truly duplicate. Bottom line is, these amps will ALWAYS be classics and the tones we all look for. 🔥🔥🔥 Thanks for the video and the killer tones! Best! ✌🏼 🤘🏼Stashman 🤘🏼

[@matsandersson8857]

Jim Marshall had the shop and a sound he was after listening to what guitar players that came into his shop wanted. But it was Dudley Craven and Ken Bran that worked on the amp Looking at pictures Hendrix, Page and many others didn’t blend the channels. They just plugged into the upper left high treble input.

[@andythrash.]

Oh my god, the holy grail of tone right there, BEHOLD!

[@Turboy65]

To clarify matters, a true "plexi" is a JTM45 or JTM50/100 or any early plexiglas panelled Marshall, end of story. When the JMPs switched to metal panels in 1971, they were no longer plexis, and by that time the circuit and sound had changed somewhat as well.

[@johnmarshall3903]

Absolutely correct, except the change to metal panels occurred in mid 1969

[@Guitarjosii]

Marshall JMP? - It's a good place to be! I'm very happy with my 1987x Plexi... use it with a small Rock Band and playin' in the local Pubs... got the right volume for these gigs.

[@RandomGuitarist96]

Perfect Jimi tone at the start

[@nikkawick312]

When the Marshall sounds like a angry soul screaming, that means it’s working.

[@RockNRoller66]

Proving once again that's impossible to play an amp like this without staring at it. I got my first 100w Marshall half stack w/G12H-30s in 1978 and I've practically never looked back. I lost that one in a fire in 1995 but replaced it with many others. Rock on dude!

[@MrUltraworld]

I have a pair of '69 heads, one with tremolo. I purchased them in '79 for $500 w/ greenback loaded cabs. They have been maintained carefully & still sound enormous. But the volume will neuter you. An OCD in front of them is pure heaven.

[@noobpower96]

Gotta love that Plexi sound

[@matag95]

the amp of all the amps.

[@jimsteele2072]

This amp and an old Fender Deluxe are the Two Essentials of Rock.

[@vinnivinci702]

the best anp ever !!!! 🤩🤩🤩🤩🤩

[@ivandeus]

Fantastic sound!

[@pompom906]

why are you staring at the amp while you're playing? Does it have telepathic tone adjustment?

[@mikhailshi]

What a great tone!

[@mossberg451]

Love that tone

[@guizim9612]

I'll have one of these one day

[@cameronland4439]

Same!

[@AMPSHOWS]

Great review of a benchmark amp. As you know Jim Marshall did not work on the electric/sonic aspect of any of his amps. He did work on the cabs looks and design. I interviewed him in 1986 and he explaines this. Cheers!

[@TheKassie1987]

I believe the gainy fuzzy texture has nothing to do with the amp itself but as much as the old cab. Those pre rola drivers add a lot of muffy speaker distortion... if you look at the trainwreck video. It has the same kind of gainy/fuzzy texture. And trainwrecks are supposed to sound a little clearer... another possibility are the preamp tubes.. though NOS but amperex sound very midrangy.

[@bughat1]

A friend of mine bought the whole stack back in 71.$950!!!!!!! The tubes would run that now.

[@1337Atian]

the old plexi is something to hear...:)

[@MeandtheOwls]

The SOUND!!!

[@carlbrooksjr6274]

It definitly has that ventsge Marshall sound I always loved the sound I shoot for out of my own Marshall stack I dig it as we old rockers use to say in the old days to quoat one of you earlier commenters and Link from the Mod Squad ...Solid

[@moimeme7839]

The voice of Rock😀👍 great amp

[@luke-da-duke]

thats some fuckin tone right there

[@louski331]

Thanks for the advice smart man i just bought a blackstar club-20 head with a older marshall 4x10 cab from sam ash in franklin mills in northeast philly awesome sound tight

[@AceOfHeart2012]

Unless I'm missing something I believe the proper jump would be into the low of 1 and into the high of channel 2 and plug into the high of 1. That's how I do it.

[@2007srv]

YES I just seen this vid other day still trying find time to try that jumper combo hes got going there on my 68" clone .

[@sixstringfretter]

When I read this I just about laughed out loud. So true, so true

[@julianrodolfo]

did not know they existed. thanx.

[@blueser202]

Dude, that amp is something to behold! I would love to be able to stare at it, let alone play it!

[@rbauer1632]

Interesting comment at the end when he said the amplifier "has a nice kind of sag when you hit the notes." I also hear what he is talking about, but confused as to the reason for this "sag". I'm not a Marshall expert, but I think one of the main differences between a JTM and a JMP is the solid state rectifier in the JMP. Since sag is a phenomenon of a vacuum tube I wonder how the JMP achieves this effect? I like this demonstration and sound, though.

[@michaelallen976]

if i can describe "sag" in a way that all could understand, its a reference to that spongy, swishy, softened/slower attack type of thing that occurs when overdriven and played with a more aggressive hand. Its a kind of compression happening with the notes. You can hear them squeeze. Amps like these old Marshalls are very aggressive amps when pushed, but there's a definite sweetness because they dont have a super fast response like say a Boogie or Engl or something. The notes dont immediately jump out. You can definitely hear sag, but most of it is felt and its absolute heaven to a good player.

[@jsadctnfn1]

Sound is excellent!

[@musicmick71]

2:50 The Sound!!! nothing beats that, Les Paul, Marshall......

[@yaniv-nos-tubes]

nos tube sets : 1.vintage vibes: v1: 1956 mullard mc1 longplates v2: 1958 mullard f91 longplates v3: 1959 mullard f92 balanced/power tubes 1950's xf1 el34 matched quad . @t marlin: v1: 1958 mullard longplates f91 7025 v2 mullard i61 1959-1964 v3 1964-1975 mullard i63 \ power tubes 1960's mullard xf2 el34 3. green marlin v1: 1964 mullard yellow print i62 v2 mullard i63 v3 mullard i63 /power tubes mullard xf2 4. ultimate warmth (bluesbreaker): v1: 1960's brimar 6057 yellow t v2 brimar 6057 v3 brimar cv4004/xf1 @t :v1 1960's mullard 10m goldpins v2 1959-1964 mullard i61 v3 i63 6.striped marlin(jtm): v1 i61 v2 i62 v3 i63 7. swordfish(jcm/jmp): v1 v2 v3 all i63 8. 1974x: v1 i61 v2 i63 v3 ge jan 12ax7wa

[@DangerRifai]

It's to do with the way the amp breaks up with more volume. The simplest way to describe it is that there is no (dedicated) gain control and no master volume on it. If you want a dirtier tone, you turn it up. If you want it cleaner, you turn it down. The volume controls you see on the amp control the preamp stages.

[@purplepineapple117]

Wtf that sounds like the real deal...

[@harrywilkinson6460]

Like a warm blanket all over you in winter

[@TheSuper2sheds]

these amps are LOUD! and that is the point. they are also EXCELLENT platforms to use with pedals for distortion at reasonable volumes.watts are watts,if you currently gig with a 50 or 100 watt amp,you can use this.for less output use a 2x12.of course when you are in a big enough place CRANK IT UP! and grin that stupid grin

[@willdenham]

I love what Jeff does with the classics. I heard he had a migraine during this demo. That's comittment.

[@joeytruelove]

Being such an early JMP it's likely to have some JTM qualities still in its design. Probably why Hendrix and Clapton is mentioned. Seems this particular amp is overly gainy in a 'bad' way that it loses the contours of tone far too easily. Like someone else said the settings doesn't do it credit either and the choice of speakers would be atypical for this amp as it would more likely be seated on top of a fullstack of 75Hz G12Ms.

[@DailyBrusher]

You guys aren't paying attention. The amp demo'd is a 50-watt. I've been playing an '81 JMP 50-watt since 1988 or so. Lots of stages. And, the way I want to play my amp is also the way I want to hear most other guitarists - a wall of guitar noise, with some snare and bass and vocals in there some where. With 50 watts, if the drummer is very very loud, the guitar can get lost. But I also play an Ampeg V4, 100-watt. And that can be too much in a small room.

[@Nghilifa]

Oh lawd, that strat sounded so nice through that Marshall! Are those hum cancelling singlecoils? (I didn't hear any buzz)

[@fanoboss]

MORE REVIEWS of classic instruments, amps and pedals

[@MuscleDad420]

You and just about every other guitarist in the world, kid.

[@invin7215]

Yeah, if you tell people it's expensive and vintage and the holy grail, they automatically think it must be the greatest sound in the world. If it were a blind test people would say, "I've heard better." :D Personally I like a little less fizziness.

[@2007srv]

I use a Phillips 5751 tube in V1 , clears it up , or a 7025 RCa .

[@DMSProduktions]

I agree!

[@kapazezza7287]

That cab is special

[@stipeur]

the sound of the gods!

[@MrCoolhandLucas]

Beautiful.

[@adamwatson6916]

Jimmy page did not jump the channels . Jimmy was always striving for the loudest cleanest tone he could get which is why he modded his Marshall's for more clean power and I heard nothing in this demo that sounded anything like page tone .

[@pk952]

Thats the sound 👌

[@robfak]

I got this one sn 11xxx and differences in sound are due to recording and uploading compression, all things that are well known

[@carlosgoyeneche6315]

This is it...This is the amp

[@murfdog19]

I use 30 watt amps these days and the sound guys still tell me to turn down. There is nothing like the roar of a quad of EL34s cooking, but as you said, there is no practical use for it unless you are playing arenas. It seems modern 100 watters aren't as loud. I play with a guy who uses a 100 watt Marshall Vintage Modern with a 4x12 cab. I use a 30 watt Orange AD30 with a 2x12 cab which seems MUCH louder than his 100 watter.

[@DirtyDavesDirt]

OMG, that's the sound I'm looking for.

[@elirosen1391]

Are you using any fuzz pedals? Or is the distortion coming from the two channels being interconnected?

[@namepavarde44]

perfect sound

[@sparkygroover]

Used to own one. Can`t believe I sold mine . What are they worth these days?

[@timothyn4929]

Originals are like $7k or more

[@KevinMcLaren71]

That is the tone I hear in my head

[@rodmclean2066]

Ah the joy of comments bagging old Plexi's....... from those that have never played them nor owned them. Armchair tone experts. As JMH said.......... " when my Marshall's working right, nothing can beat it, nothing ! " I own a totally stock '68 50w and mint stock '66 JTM-45 MKIV SuperTrem Blues Breaker....... Tone to die for & I play em at home at moderate volume no problem. G12M T1221 003 Pulsonics 25w

[@egSmith-sp9gl]

Armchair tone experts lol

[@klepetar]

of course..i use a fulltone ocd and / or the plimsoul for overdrive..

[@uncleslash777]

Absolutely perfect! Just wanna crawl into amp and stay there

[@heikojakob6491]

Which attenuator does he use ? I can't turn my 1959 up to this much gain being in the same room without a attenuator or getting deaf either.

[@qua7771]

Ahh. What history sounds like.

[@angelolivares8754]

Go to 3:53 if you only want to hear the plexi sound

[@zachjal]

ya the new ones come with a "wood" knob in the EQ section, you should check em out

[@JonasSweden3]

Hmm, great stuff. How loud was this turned up? Attenuated?

[@ForViewingOnly]

1:19 Spot the punch-in of the words “..the Plexi...” ! I wonder what he originally said?

[@timothyn4929]

Sounds so bad 😂

[@spideymarino]

That's great. Well done Jeff! That's gotta be loud..

[@lighteningboy]

This is the amp! I have a JVM 410, I can get pretty damn close

[@willdenham]

I thought this was Jeff's plexi, after watching the origin of the JTM45 vid.

[@24meandyounothing]

just wondering..is the LP a solid colour or trans...Looks like my LP(1996 3pc matched top..have only seen 2 others in Toronto.)

[@alienlovesecrets9379]

Damn. So good.

[@mattfuller4307]

It needs a different cabinet it would sound a lot better

[@Beizeiten78]

Matt Fuller Ha, literally the same type of cabinet (closed-back Marshall 4x12) and the exact speakers (pre-Rola G12H-55) that Jimmy Page used live for the golden years of Zeppelin. It’s shitty miking and/or bad amp settings. Also, it really needs to be CRANKED, because the power tube soak is a big part of “that sound”.

[@klepetar]

i had a 1959 slp 100 watts..you go inside it and clip some capacitors .. i think it's c17-18 maybe c16.. and the 'bright' channel becomes manageable.. you then use the 'bass' channel to give some oomph..and yes..you can then crank it to '3' .. believe it or not..jimi hendrix's amps were done this mod..because he didn't like the sound they had because it was originally designed to be loud as hell .. pete townsend has somethind to do with this..

[@louski331]

how do you like the evh111 amp?

[@MrMeik1970]

Dreamtone... The One 👍

[@davidledford6482]

david bray has best plexi videos etc on here though come close to being muddy....

[@2007srv]

David Bray is an cool guy :) bad ass amps and Mods ! .. I have a clone 68' plexi right now from Kevin @ Rokkit Retro , nice

[@johnmattei2799]

The mud is easily fixed these days. Im getting a marshall jmp before i die

[@mtbmadman011]

Jeff, you look so young! Haha!

[@murfdog19]

According to Marshall they did; it's called the Class 5! HA! Seriously though, many boutique companies are building low watt amps that get a better Marshall sound than a modern Marshall.

[@Hxris43x]

What is the brand of the pink amp at the back? It looks like a marshall

[@coffeewaldo]

I wonder how it takes pedals? Since I can't afford this I'm waiting on a plexi drive pedal. Maybe this one won't get lost 2 different times usps and UPS.

[@1971SuperLead]

The Wind Cries Mary

[@davidledford6482]

plexis an marshalls came from vox,and fender,blackmore would play at the marshall factory testing the marshall majors an jim was a friend of his an the who,an led zep,an he was a drummer though. an ritchie said its part fender part vox..

[@Guitarjosii]

Jimi Hendrix - The wind cries mary

[@j1m1jam]

This amp is NOT a prototype! This amp was MFG in late 68 to early 69. It has the filter caps on top of the chassis AND it has bonnet style selector knobs on the back. Redo this video with correct info...

[@vecchiume1]

the first 50 watt models had still the tube rectifier.Otherwise mine is something strange .Took it as a long studio work in 1989.I was a young bass player working on a record of a group with a bass player who had problem recording .....and they barely had the money to pay 100 hour of studio.Now everybody want that amp,even who gave it to me,who was a fender nerd who hated marshalls is trying to buy it,he has a music store now.But i don't sell it.

[@j1m1jam]

@@vecchiume1 They were know as the JTM series short run 50's.

[@vecchiume1]

@@j1m1jam Short run?It makes sense to me as I've never seen another one in Italy.I had it when i was 19.....I'm almost 51 now..I Did not have a real electric gutar at the time,Only two basses and the double bass .A friend of mine who was not a player gave me a japan made telly with a reverse bone nut and gave me the money to buy a 2x12 handmade walnut cab.I became a guitar maniac and the local police was at my door more than once falling in love with british crunch....I had much more than i wanted and now ( I have too much of eveything and I don't really care )I will give it all away to have my Lefty friend back.It was my big bro also named the guitar man who doesn't play.or also ji (Gi) .Kind of a half Jimi half Jim...I liked running those name jokes .Anyway thanks for the info.Your name seems guaranteed as your knowledge (as my english is not.).Cheers.

[@j1m1jam]

@@vecchiume1 What does the front plexi panel show? JMP or JTM? Marshall was a nickel & dime operation back then. They sourced the cheapest parts for their amps (i.e. Torodor switches from Italy) so there is a lot of variation.

[@vecchiume1]

@@j1m1jam It's already a JMP one..It's in the studio in my "country house" in another "region" like almost all my Big boys and rack stuff so i can't tell you the serial number.It's been manufactored october 1967.The original owner told me it was a 1968 model,after ten years the guy who builded all my bass preamps,mofet power amps,kt 88 80w/100w/200w stereo Power amps and alot of other devilish things and modifies told me october 67....he didn't even know I owned it because we were always after some bass related shit as it's always been my main work.He kept it in the lab for almost two years.The hi fi customers were attracted .... they are the strangest kind of people around tubes.

[@psour33]

Thank's beautiful sound :) Even on clean sound this amp seems ready to jump at your throat :)

[@dinmentor]

this must be a 50w bass spec plexi, like the Marshall 1986. maybe some hybrid at least since its a prototype amp... the sound with the LP bridge pickup and cranked bright volume with no Bass on the EQ just cant sound like that on a Lead spec plexi, sounds very fat! Well in my opinion at least. Sounds very fat with the strat also with the bass at 0.

[@KyleSG88]

Part of the reason it sounds like that is more so due to how he has the amp jumpered ;)

[@noobpower96]

Yeah i always leave a bit of room between cab and mic aswell, just sounds more...full imo

[@jakemcdonald7462]

With this amp it seems like you could sound like Page, Schon, Hendrix, and hell, maybe even Clapton.

[@dmthandmade5674]

I couldn't even get to the guitar tone on this because the audio and narration are so awful. Did you get one of the IT guys to do the voice over or something?

[@kalebaldwin5398]

@DMSProduktions That's the problem with most bands today. Everybody seems to be scared to be loud! Too many are playing by the rules.

[@JamesMcCutcheon]

I am a Strat man. Lp's are just what they are.

[@BAJARACER43X]

didnt seem to have much gain, but most older marshalls dont, most older jcm 800s (2203 models), didnt have alot of gain and most are modded

[@Worshipcaster]

love the top comments...

[@guitarnut7438]

this is THE tone! But I see you playing with ear plugs... and this is what I DON'T want!

[@AminaTabs]

They don't have master volume. You need to use it with an attenuator or you might get deaf.