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Marshall 4100 JCM900 Dual Reverb [1990-1999] [2003 - ? ]
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Marshall 4100 JCM900 Dual Reverb [1990-1999] [2003 - ? ]

Tube Guitar Amp Head from Marshall belonging to the JCM900 series

BlackMaple BlackMaple
Published on 03/01/09 at 07:25
100w amp head two channels. 4 EQ bands common to both channels. Independent reverb settings. loop switch effect pentode, triode or 50 / 100w. a little less headroom and harmonic 50. 3 12AX7 pre-amp and 4 EL34 power 2 for me as it was in Retube 50w .. SEE my opinion on JCM900 Dual Reverb 4100 (yes it is listed two Once the head ...)

I did Retube in 50w. Mine is equipped with EL34 and not 5881 (I think this is a very important detail.), Model lamp more représentaif sound marshall.

My lights are Mullard EL34 with a 12AX7 input golden dragon. (A must for the clear.) The powers are no longer as the number 2 course, 50w forces, so it's switchable 50 / 25W.



USE

I precisely this point in detail "sounds".

It is not so obvious as it seems ....

SOUNDS

The whole problem. its use does not ultimately proves to be so easy because it asked to be pampered Marshall future.

This is a maligned amp. For me, the views of a minority opinions "international", see eg Harmony Central.

This is an amp that ultimately needs to be tamed. The one does not ring on. Its major problem is its lack of bass. Its equalization which seems inneficace but gentlemen: Let's stay serious when he spits his bowels, CA has absolutely nothing to do.
And until now, I said loud and clear:
No amp seduces me as much as that one. I saw the green and not ripe for 10 years now ...

A highlight is the mode of operation of the lamps. In pentode or triode if I'm not mistaken. Or 50 / 25W.

25 it will tend to be more "soft" more chubby than 50 or it will sometimes be more acidic and sharp.

My opinion is especially the 25w mode.
The Channel A:

His clear and overdrive. Jmp sound can easily get out of this thing to be done: a small das GE7 the loop. A low one is there.
At higher volumes it will touch équalo the amp itself, las low wake, acute too! My setting is a low background and a support adapted to each situation by GE7. The mids and treble thoroughly virtually cut off. I play with the presence that makes the finest eq setting.

For the top, this is my solo trip, AC / DC and others just to rant a little amp.
For purely sounds clear I am quite a fan of the compressor mixture / chorus, which gives all its density. I use an old compressor Guyatone ps103 (mod germanium) cruised to a Boss DC2. (Never heard of such a chorus: MAGISTRAL).

Channel B:
Clearly lead! for the pun ... CLAIR lead-ing ... Ok I spell ....

It spits fire god! High gain, it certainly is not, but remember that we are coming out of a period or to saturate the amp that was all thoroughly developed bar ... and may be not necessarily the way to a pedal od significantly less accessible today.
Today, with modern music, the high gain mention seems ridiculous ...

The grain has narrowed, compact, mute already very nice .. Iron maiden, metallica and justice for all ... In her I always use my GE7, but in addition I stick him overdrive on the teeth!
A sd1 or Od1 home boss, that's what makes it sound better, mediums forward and dry acute, are perfectly acitivities grain of the amp.
Mutes are so daunting! mdrr!

One enters the Deftones without worry. It's heavy, dense and thick has wish. Muscle Marshall in all its glory, every time in 3 years I remain stuck and I'm in love! It amazes me to this amp AC, he knows how to clean, hard, heavy metal and carefree.

The reverb filled his role well, I find it a bit long, fine adjustments to the beginning of beach ca not displease me ...

In short, a versatile amp with a vintage anyway its always on the settings of channel A, and well suited to rock / hard / heavy.


NOTICE GLOBAL

If it were to do again, (I got it for 400 euros) I remade on.

In short it is an amp you need to know and do to tame what he's done. Versatile, and also inexpensive opportunity. For a review and a max!
Some settings and for me (it's also a pleasure to be HIS type of sound) in 25w rather, good lights, good effects and good guitarist.

Finally I ca work! mdrrr