All user reviews for the Marshall 4102 JCM900 Dual Reverb [1990-1999]

12AX7 and EL34 amp, 2 channels support spars

USE

Simple configuration, a little heavy Nevertheless. ONE obtained her whatever you do! Rverb drinking no more. No need to book ... is connected and outputs the boulles ks.

SONORITS

I bought this amp ocass after having had a Valvestate 40W amp dsirant "all tube" from Marshall saturation mostly) not too expensive. I lai used with stratocumulus and les paul (piphone with micro SD) and a crankset ME10. Music Style: Rock (from phone Mtallica through ledzep, Deepopol and AC / DC) variety and opportunity.
The rglages? very simple since almost innficasse !!! For what is clear sound ... it is a HORROR !!! : Law and dry without heat !. For saturasion by found against the grain of AC / DC with frying more and less heat. I do not remember the hours tweaking this amp to give it a clean sound: The rglages no end with my crankset, test diffrends HP but without much success, the only thing that improve the sound will have to add a 4X12 BAFLE, but ... O is intRet the COMBO this time l Not really I do not regret having heavy after a year! Later I bought a JTM60 me reconcilli with Marshall.

NOTICE GLOBAL

I regret bitterly for having bought this lssiveuse!

The char 't have prcedemment quotes, one is on the tt lamp mga simple, not c the road king !!!
a face outlet, you see ...
100 watts, effect send and return + line out, well we will say c rather banal, but it is, it seems kon can earn a gain and level by connecting the loop in effect ... no test yet I find k'il should not dconner 100 watt lamps tt sending ENOUGH

USE

Well l must not think that has live sounds nikel because c tt simple, and not bin should not do nimporte true ke koi becaufe c eq is not readily grable see dcevante as it is not very powerful. Let me explain, the bass is not to go, only the medium will allow to pass a bluesy stuff, a common rock, without extreme ...
the saturated gain is quickly made its max, and leaves quite a few possibilities ... however clear achieves dgeus Crunches not my taste, c its probably the best use. No need to look for a true clean..humhum..c not very bright, c amp british koi, a machine made for rock !!! not a trick to play pat metheny (ke I love the way, and if there is a play of marshalls dfoi !! haha). otherwise rverbs are pretty easy to use

I would say that c also nice to play music without arretter tt time to turn his knobs ...

SONORITS

Clear: um ... rather straight, not very cheerful, but not crystal clear warm c c rather tide, AC not cooling the back but no eyes ptillent bohneur mesa is better in clear and my pr en the twin fender, it is better to push the gain and play crunchy, it is gaining heat, scale, and then c true that eventually adapt his game a bit this kind of config ... but in general c was not so bad
Distorchion: Well, right channel, nice sound, I find it a grain kan not even pourrave, do not exaggerate, we speak of a tube amp marshall, (probably one of the worse ..?) not a peavey bandit ......, koi are done, you'll tjs almost the same sound you got bo cut mdium, y tjs has mass, no bass treble not tjs very comfortable, but is a grain c undeniable and those ki is very low st prcedemment down a bit the cow must be a purist habitus luxury amps
Lots of things to experiment from an amp like that, the guitar has lctrique first begins with the heart, the energy, feelings are worse fingers, guitar and these satan HP ki ns rendentr hammer !!!

NOTICE GLOBAL

Jel'aime me my amps, he follows me for 6 years, lamps st the same since (and not well ac ...), so I tjs dfendrais. C really nice amp, not tt do but watch them same men want to do music heads, normal ki conoivent amps for dstines tasks: v rock, exprimental , blue / jazz, not super nervous but it not a ki amp sleeps in his corner someillant while you play.
If you find an inexpensive (2500 fr balls) may do otherwise buy JCM2000, c better hahaha

100W tube combo (mine has 3 x 12AX7 and 4 x EL34, but there are also versions with 6L6), switchable to 50W.
One input, one non-switchable effects loop with adjustable level, 2 speaker outputs (8 and 4/16 ohms), one direct line output and one with amp simulation (I haven't tested it) and that's it.
On the front panel, a clean gain, a drive gain, an EQ (bass/mi/treble/presence), volume and reverb level per channel and that's it (which is more than enough).
As for the speakers:, 2 Celestion G12T75 (a very questionable choice by Marshall).

UTILIZATION

It couldn't be easier to dial it in, given that the EQ (as is often the case with Marshall) is useless (I'll come to this later).
The clean sound can crunch gently and be even a little biting, but that's certainly not its main utility. Likewise, the gain level of the drive channel is easy to gauge but it will never tickle a Recto or any other Hi-Gain amp... Contrary to what its name might suggest, this amp is intended for big rock, stoner, punk, but not to extreme metal, not without external "help." that is!

SOUNDS

In terms of sounds, you could be disappointed by two things: A pretty tight clean sound and a drive channel that doesn't have too much gain (a typical Marshall characteristic), despite yielding a really nice color with the gain between 1/4 and 3/4.
But you do need to consider THE main defect of this amp, namely a completely useless EQ. Moving the controls won't affect sound in the slightest, but not moving them at all will make them rust and produce crackles...
However, inserting a (good) EQ pedal in the effects loop will change your life, I really mean it. Clean sounds can take a different dimension, reducing a bit (or more) 800hZ and increasing 3.2 and 6.3kHz. Personally, I have found more than one funky sound with this combo. It's obviously not a Twin, but it's pretty acceptable.
Anyway, don't hesitate to use good drive pedals. A TS-9 on top is an excellent choice, both for the clean channel and to boost the distortion channel.

OVERALL OPINION

I've had it for a VERY long time (more than ten years) and I have even had the amp head version (4100). I just had it retubed and checked. The technician told me it was originally biased too cold, which could explain the sound stiffness and a lack of gain. Don't hesitate to ask your guitar tech about it!

Today it has gotten back on its feet and it's a real joy, despite its size and weight. Its useless EQ still bothers me, but the amp works fine with pedals, and its ultra low character could make it an excellent choice if you are looking for a typical big rock, punchy and reliable amp!

It's an all-tube Marshall (3 X 12AX7 for the preamp and 4 EL34 for the power stage) that delivers 100 watts (switchable to 50 watts).
It has 2 channels, with volume, gain and reverb control each. The EQ is common to both channels (Low, medium, treble, presence).
As usual with Marshall, simplicity is the name, it goes straight to the point and, then again, why complicate things when it sounds good just like that?

UTILIZATION

Ultra-easy to use. No need for a manual, even if the latter is well done.
As I said earlier, Marshall has always played the simplicity card, and it's easy to get a good sound, be it clean or distorted.

SOUNDS

It's basically an amp designed for rock and hard rock. But on channel A, you get a quite appropriate clean sound and the reverb is not bad at all and pretty natural. Fiddling with the gain, you can get a slight crunch and, provided you have pickups worthy of it, you'll get a first glimpse of what this Marshall can do.
Channel B is for distorted sounds. This is not an amp to play METAL, because it has a typical rock sound, but its aggressive side gives you access to a wide range of more vigorous categories.
Personally, I try to avoid effects and I get a good distortion level. But I start from the principle that the guitar has good pickups, with a good output level.
I don't want to enrage JCM 800 fans, which are excellent. The JCM 900 doesn't have that striking touch of the JCM 800, but it has inherited a very respectable sound, with a lot of versatility, thanks to its two channels.. The JCM 800 has a single channel and even if you know how to handle the volume control, it's hard to toggle between clean and distortion.
What's more, you can play at very low volumes with this JCM 900 and still get a nice distortion.
Do note that you shouldn't neglect the quality of the tubes. But that applies to all amps. As far as I'm concerned, I wasn't looking to make a mixture of tubes. I just wanted good quality tubes.
I can assure you this amp sounds very good. And I won't make any comparisons to other amps (Mesa, Fender or Rivera). Each has its own personality.
You can also change to 50 watts by means of a switch. But I don't think that changes much. It can be easily used at low volumes in almost any case.

OVERALL OPINION

I've used it for quite some years and it's the second one I have (the first one I had was a 4101, with only one speaker).
I currently have a Fender TWIN AMP and a Peavey ULTRA PLUS, two amps I love and with very different styles.
I've also had several Marshalls (TSL602 and TSL122), an ENGL head and a Vox AC30.
With hindsight, the JCM 900 4102 has its own personality. Because for me, there's no real Marshall, or a Marshall with a better SOUND than another Marshall. There are dozens of models and each has its own SOUND.
The JCM 900 is, at its core, a typical Marshall, I can assert that without hesitation.

Fans of pedalboards and other effects pedals won't be disappointed either, because the tone is excellent.

I gave it 10/10 overall. Even while being pretty demanding at all levels, I like its ease of use and the fact that it reproduces the sound of the instrument.
By the way, it is in its original state and I don't plan to change anything (speakers, electronics, etc.).

I would definitely buy it again without hesitation because it's an excellent amp for live use and its price is pretty reasonable.

Tube amp with 4 EL34 power tubes and 3 ecc83 for the preamp stage, 100w 2 Celestion speakers. I've used it for 20 years every weekend for about 5/6 hours and it has always sounded impeccable.
I changed the tubes once, I equipped it with a IBANEZ EU400 rack
The sound of channel 1 (clean) is always very, very good.

UTILIZATION

It's easy to dial in, so there's no need for a manual. As for the distortion, it's a Marshall.

SOUNDS

I use it mainly for clean sounds, not too pristine.
I play an ARIA PRO TA75 guitar.
The 100w of power are more than enough, if you set it to 5 or 6, it kicks ass.
It's 20 years old and still works fine.

OVERALL OPINION

I won't sell it, that's for sure.
Its only defect is the weight!

Lights at all even if equipped with op-amp.
100W switchable in 50Watt.
Two spring reverb has (finally a box and two independent settings). It is top when all the amp coming out on the walk does not even have a reverb.
For the rest classic 2 Vol, 2 Gain and Bass; Midel, and treble ..

UTILIZATION

Super simple manual in English and retrievable on the internet and all the diagrams of electronics making it a simple amp to modify or repair.
The clean sound very good with a lil reverb is not bad at all. As you go up a little crunchy sound happens it's too good with my SG I enjoy but the top is channel 2 and the welcome in the small world of Angus in shorts.
Well, it is not everything but I find it versatile enough for me on the rock / blues / jazz even / varietoch ... I do not metal but with a good big pedal it should.

SOUNDS

So there ... see above.

I find it well, ft for the purist 'all tube' I hope they do not use effects because they rely transistors and op-amp.

It has a fairly wide range of sounds. I was particularly surprised by the clean sounds well defined.

I use it with a 1922 (decrying too) but the combination of both great and I resumed the grave and I have enough volume to scenes without sound.

OVERALL OPINION

Repeat with the right combo and with the little sister in 1922.

Ca is good but not long after the festival of music in me it took three concerts will result in the mouth and they would discuss the reliability of the product

Purchased from Mothers Music,Edmonton Alberta,Canada.Bought this unit brand new ,It had been sitting around the store a few years.I stole it for $1325 Canadian (not a scratch on it-like it just came out of the box)Included footswitch.I needed a good solid tube amp for blues,rock,jazz and beyond.

A sweet sounding monster that i can play anywhere.Hendrix-sweet music,sweet music.This amp does it all.I can get all the the sounds out this baby from crystall clear to raunch -just add a wah and away you go again.I've heard all the arguements about amps four to five times the price,I've played about half of them and my conclusion is that this is a Grand Dame Amp of the music world.Classy looks,versatile and responsive controls,Pentiode and Triode swicthability,natural sounding Celestions(G12-75's)that don't color the sound (guitar amp version of the Bowers and Wilkins audio speakers).This amp plays exceptionally well at all volume levels although at the higher end it will your brains out.


This amp is a gift from Greek gods for any muscian.

Powered by four 6L6 Sovtek's-this is switchable.100watts of brute force if you want.Warm ECC83 preamp section and not a microphonic whisper coming from any of them.Build as good if not superior to the Bruno boutique amp line at about a third of the price.Quality is top notch with all the little nuances you expect from Jim Marshall-elephant skin tolex-big Marshall name plate-brushed brass faceplate and backplate-corner protectors and on and on......

I am so glad I came across this jem.I'd been looking for a Marshall for about one and a half years.I don't care what the whiners have to say this is one the great all time amps -PERIOD!!

This review was originally published on http://www.musicgearreview.com

I have some ready in time. 2 channels reverb 2 1 2 2 volumes equalizer master volume. A loop, a power pedals, and a switch to lower the power by half. What a joke, it's always too much!

4 lamps 34, a driver ECC83 and two ECC83 preamp lamps. Rectification diodes as always.
2 celestion g12t75 16ohms, compact amp not too too heavy thanks to the handles big size

Construction: The frame is enclosed on the sides, the metal is very thick, there are two printboards in, the bases of the lamps are soldered directly on the PCB but screwed to the chassis and connected by cables to print. It's a good job, pro. I consider any connected with the bases of lamps on the print as junk and a beautiful scam.
It is a good amp, madame!

The copy test is also old, and nickel works.

UTILIZATION

It's childish, the two reverbs are for sth, you can have lots of reverb in the clear and very little in Graoua. As long as they were able to z'auraient a loop for each channel to be top.

I was surprised by the drive channel for once a bass. The clean channel is missing, but if pushed from 2hrs is more dirty and bassy.

In practice I put some treble, midrange and bass adonf 10hrs'

Very little background noise when the guitar is good. Distortion in a fender thoroughly with the public will shoot you as boss' ...

Really easy to manage as amp, you know where you are and where we go.

SOUNDS

Ben, is thin but clean contrary to popular belief exploitable with a fender jazz guitar, less trafficked in the frequencies.

I use a les paul passive, one active, one Barden telecaster style, an ibanez satch style.

The super clean channel responds to simple side handle, double or split, the low level of the guitar can push the gain and have a lively sound and shimmering.

The other channel given the relative low level of distortion is better off with doubles, and more with the assets (60a emg on my les paul tribute 60s) in that a layer is added to the crunchy distortion, it's strange but super nice. Zakk's what its there.

I can imagine that passive pickups through a boost pedal gives a similar result.

The game adonf distortion sounds good in separate agreements with lots of delicious harmonic overlapping, it is addictive but is a scratch that takes the agreement.

Only disaster on the board, I plugged in my amp and ibanez RG7 collapses completely, it's a little too serious for him there ...

OVERALL OPINION

I will not play a lot with a lot, I have on loan and it's not what I want in fact. But I think I appreciate the true value for its its not doctored and frankly, it's great to know where you are with an electric setup.

Every guitar sounds different, even those that are quite similar (les paul studio worn 60s tribute and such) in the construction, marshall is therefore transparent.

There's something with the old marshall is that by scratching a very aggressive and very aggressive hp ben the result is pretty sweet. Bizarre, alchemy ...

Of course I not put the notes Max, I keep in mind the price charged by the manufacturer for this product, really cheap but time has proved its worth.

All Tube Amp and 3xECC83 4x12AX7 to 100 watts of power.
2 channels clean and lead with separate controls for volume and gain but reverb and EQUAL common, which is very annoying.
At the rear output 2 hp reducer power 50w and adjustable effects loop.
Classqiue short but really bad point for the equalization policy.
The footswitch is reduced to the minimum channel and reverb

UTILIZATION

Frankly, no need to turn time for a sound, we choose the channel, EQ, you push the gain and go. From this point of view, the use is simple

SOUNDS

While there is no doubt the big disappointment. The clean channel is quite nice looking por a clear round and warm, but it's still good the Marshall sound is so soft and does not shine. However the lead channel is a fiasco: While playing for the crunchy AC / DC Bryan Adams and so on, it is ideal but if not, it's not worth considering to play the metal and even with ordinary hard. Even fitted with groove tubes, the amp does not issue large saturation, and especially the EQ, in addition to being common to both channels, is very inefficient and turn the knobs has virtually no influence. Yellow also spring reverb too fragile loose as soon as we carry the amp for a gig or rept '. The best way to play is hard to play clean channel with a distal loop, but then you lose the lights!!
Last thing: but where are the 100 watts, this amp has no fishing!?! Blame the preamp that does not have enough output level. Used in power amp via the loop, with 530 in Engl preamp, it has more noise.

OVERALL OPINION

I bought this amp on Ebay in August 2002 because it would be a misery, with € 450 Powerbrake. I kept only six months because it did not please me at all. The preamp is downright soft knee with many defects (equal joint reverb fragile, its lead not powerful at all, low output level) and finally with only a clear Hon. Power section remains, honest when you plug a preamp other in the "return" of the loop, but my power tubes (groove tubes yet) slammed 2 times in six months, so as disappointment on this side. If it again, I do not redeem it, even for € 150.
In conclusion no surprise that this amp does not have a big side saw its defects. It should, however, looking for a typical lamp's rock (not metal or hard) and is not afraid to break the back with (the beast and his two hp weigh close to 35kg).

Lamps w 100 amp 3 x 12AX7 (pramp) 4 x EL34 (power)
2 speakers 12 "Celestion G12T-75
2 channels Clean / Lead
3-band EQ paramtrique indolent common to the two channels, Presence, Reverb.
An output to drive a speaker supplmentaire 4 / 8 Ohms
A footswitch (not supplied) to change the channel and enable / disable the Reverb (rgler need small doses, otherwise it "makes bubbles "...).
EQ common to a 2 channel dj is terrible. But in addition, it is totally ineffective ...

The weight is quite disabling, require 2 HP, but there are two very practical grips on the cts bte, it's easier to transport than bte lani re on top.

In short, 4 points for the grips, that's all ... Rotten EQ, reverb mean ...

UTILIZATION

Trs easy to use, basic limit trs. A clean channel, crunch channel (say that these babies have bones call this the High Gain SERIES ...)

Not too galre carry thanks to grips on cts.

4 points for the grips.

SOUNDS

Its pretty clear a Triqui dampleur really miss.

Its saturated typ Marshall PERIOD lean ... you really push the volume for a sound ... and more ...
So not so good if you have neighbors ... There's rpt that we can lcher ... Cest and not even a good Marshall ...

So sound gross Marshall as Clean Lead without pushing the volume, it's really b'en blah blah blah.

4 points for the grips ... But if it should affect the sound nan?

OVERALL OPINION

I have since 1991 been And I lay close to 10 years (using only the power section). I did change all the lamps, jai test of a 12AX7 diffrent flops, adding a baffle. Do anything. The pramp is dcevant, and its a euphmisme. LTAG and power is lazy, its 100 watts push sacrment quune least 90 watts Mesa. And colors (well, he castrates) the sound: basically, he eats and vomits on the serious mdiums in the crowd.

Yeah, what about this amp jaime, cest grips the grips for 4 points ...

Mouaif, APRS is that I am allergic s'tonne Marshall ...

Amp 100W lamps
2 * HP 12 "celestion
an effects loop
2 channels clean and lead each with gain and master rverbe.
4-band EQ common to both channels
Two beautiful grips it's true!
6 because of the EQ community.

UTILIZATION

No problem: you plug t'allumes you play
rglages simple or too simple (the shared EQ)
weighed against the beast by its weight

SOUNDS

I know, I'm going to get flamed by others who have given an opinion on this amp ... But I like the sound.
The sound is quite clear round and warm, nice for jazz / blues.
By pushing a little gain a clean crunch sympathetically.
Saturated sound is good (for me). Fat.
a change of the grain mesa that any hard, fun to play hard, rock, or punk. A little metal limits (the eq does have its really a 'scoop').
But as far as I made it rings of tonnre!

OVERALL OPINION

I've had two weeks.
100W lamps for a 400 I think it's a good quality price.
This is an amp that has a sound, he must ask him to sound like a mesa is not meant to!
But not mean it sounds bad.
A good amp if you like the sound. APRS if you are allergic, so be it!

Amp 12AX7 and EL34, 2 channels spars

UTILIZATION

Simple configuration, a bit heavy nanmoins. We get to make a sound though! Rverb drinking no more. No need for manual ... you plug in and out the boulle ks.

SOUNDS

I bought this amp to have had an APRS Ocassion Valvestate 40W, DSIR amp "all tube" Marshall home for their saturation mostly) not too expensive. I used to lay a stratovolcano and a les paul (piphone with micro SD) and a pdalier ME10. Style of music: Rock (from softphone Mtallica through ledzep, Deepopol and AC / DC) and variation on the occasion.
The rglages? trs simple since almost innficasse! , In terms of its clear ... it is a HORROR! : Law and dry, no heat!. For saturasion found against by the grain of AC / DC and more with the cooking and less heat. I can not remember the hours tweaking this amp to give it his drinking: The rglages endlessly with my pdalier, test diffrends HP but without much success, the only thing that amliorer sound does have an add Bafle 4X12, but ... Intrets of O is now the COMBO No really I do not regret to have heavy after a year! Eventually I bought a JTM60 with me reconcilli Marshall.

OVERALL OPINION

I regret to have to amrement lssiveuse bought this!

The power of this amp is more than enough for even full concerts mistral without sound (already tested.
If you plan to play anyway Zenith of the amp is transplanted on the sound system ....
The conections are pure ass most of the "amplifier (few, but not need more).
on the other hand about the settings are offered little opportunity so it will sound Marshall!.

UTILIZATION

The configuration is fairly simple (low / medium / high)
The clean sounds are good (a bit of reverb) and if you are looking for a blues or unn Rock / ACDC this amp is IDAL.

SOUNDS

I have two game types: rock oldschol (ACDC / Led Zeppelin / Deep Purple .....), the top for this style, and the second east Hardcore / metal therefore more difficult to obtain but by connecting a preamp (type SansAmp) conection on cutting the original preamp ca breath away.
I play an ESP of origin and a Jackson (EMG), a volume pedal and a Sansamp, an extension speaker cabinet with HP 1922 Vintage 30, the other guitarist plays on Mesa / Dual Rectifier too expensive for my taste by against the merger between the two configurations breath away.

OVERALL OPINION

Begin to make concerts in 1998, buying a powerful amplifier orient my Coix on this amp.
My favorite is his symplicit SETTINGS, its robustness, its LE Marshall.
Cot negative can be a separate setting clear donations / saturation would be ideal.
One could compare this amp was a Mesa and say it not sound like Korn or otherwise, with some good set-up you get there (cutting the preamp) without breaking the bank (jpreferes invest in an apartment rather than a one amp separated after the group split .... thinking).
Excellent quality price given the benefit of an amplifier 100w all-tube Marshall with the claw!!

Without hesitation I would make the same choice!!