Marshall 8040 ValveState 40V
Marshall 8040 ValveState 40V

8040 ValveState 40V, Hybrid Combo Guitar Amp from Marshall in the ValveState I series.

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All user reviews for the Marshall 8040 ValveState 40V

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Average Score:3.9( 3.9/5 based on 11 reviews )
 5 reviews45 %
 2 reviews18 %
 2 reviews18 %
 1 user review9 %
Value For Money : Excellent

Gloups21's review" Great little amp"

Marshall 8040 ValveState 40V
Hybrid with one 12AX7 for a bit more warmth
1 input => 2 channels + effects loop
Output power between 35 and 40 watts
Lots of settings, but it has a stack tone that demands to be modified.


Easy to dial in. It's a pretty versatile amp in terms of sound.
Here are some tips for people who like to mess with the electronics:
Check the solder joints and change the chemicals because the quality decreases with age. The easiest mod to rediscover the amp is to replace the TL072 (OP amp) with a 5532 ($1 per piece): The sound turns clearer, much more detailed and with more breadth.
Replace the ceramic capacitors with polypropylene for the tone controls and, especially, don't heat the PCB like a madman because Marshall used a somewhat cheap build.
After all that you end up with a very brilliant clean channel and a dynamic distortion.
NB: Change the original 12AX7, which isn't the best; a 12AU7 does a pretty good job, too. Also change the reverb link capacitor, it isn't great.


It's very good for country, rock, jazz, blues.
It's an amp I lend a lot, and I can only say that it has always come back safe, despite the age and the power amp being solid-state.
Personally, I don't think it's that good for metal and its 40W aren't enough.
The speaker quality is not so bad compared to other amps at the same price point.
I like the clean sound but not so much the distortion (although that's very subjective).
Also note that the reverb isn't bad at all.


I've used it for over 10 years.
What I like best is that it's easy to use, lightweight and has a nice look.
What I like least are the pots, which are really lousy and need to be replaced regularly (3 times in 10 years).
Back then I didn't test many other amps. I bought this one secondhand.
If I had to, I'd buy it again but I would also make the changes earlier.

Jrx13's review"Good amp, despite some defective components"

Marshall 8040 ValveState 40V
40w solid-state amp with tube preamp and one Valvestate 8040 speaker

Manufactured in the '90s in the UK. That's where it gets its charm from.
On the other hand, like with many other amps at this price point, the sound starts to "leak" after several years.
So you effectively get less output signal and less sound.

You can resolder the output capacitors, but it's always the same problem.

So, the only solution is to bridge the input and the output (of the preamp) and the sound comes miraculously back!

In short, it's a good amp for beginners with a quality clean sound and a nice, not-too-distorted boost.
It simply can't be compared to an all-tube amp, but it's a good compromise and, given its price, it's a safe bet.

I recommend it to people starting out.


Not many buttons, which makes dialing in easier, interesting reverb.


The clean sound is all right, it's better than an mg50 I have. The tube is not there for nothing!!!

The boost is all right.


Nice size, not too big. I use it at home but not live, for that I use a 100W tube Peavey that is more aggressive.

GregBado's review"Fragile pots"

Marshall 8040 ValveState 40V
Tube preamp with one 12 ax 7
Solid-state amp
40 watts of output power
Spring reverb
Clean channel + boost channel, nothing could be simpler, EQ for both channels.


Extremely easy to use: Plug in, dial in and it works...


Magical sound, I've had a hard time getting the same sound with other amps (even with a more powerful Marshall). I use it for all my recordings.


Very good hybrid amp, but the pots are pretty fragile and must be replaced often.

Other than that, you won't be disappointed by the good old Marshall sound.

Rems9's review"Hard to break"

Marshall 8040 ValveState 40V
40W amp with tube preamp and solid-state power amp.

2 channels: clean and boost with EQ each (bass/mid/treb for clean and bass/treb for boost)

1 gain control on each channel (which works as a volume control on the clean channel)

1 Contour control on the boost channel, and I don't really know which characteristics of the signal it actually affects (I'm no sound engineer, but it's something between EQ and compression), but it allows you to have a wider sound palette ranging from fat distortions to dryer sounds (think of a howling fuzz).

1 volume on the boost channel

1 12" Celestion G12L speaker

1 spring reverb

Limited connections: line and preamp outputs, power amp input, footwitch.


It's very easy to use, since it doesn't have too many controls.
The only tricky part is the Contour control, since you have to fiddle with it to find out what it does (there's no word about it in the manual). But, hey, music is trial and error, isn't it?


The sound is perfect for me. I have a Leduc D2 (with a Seymour Duncan Invader) and I play mainly rock.

The clean channel is completely transparent and the EQ is very effective. I use it with only a bit of reverb (that of the amp) and even a light Chorus (taken from my Zoom MRS-8).
A negative point is that increasing the volume on the clean channel makes it crunch, so it's impossible to play clean at high volumes without a PA system, or to play with a crunch in an apartment...

The boost channel is very rich: You only need for the right combination between gain and contour, but it offers plenty of possibilities. I play almost all the time with the gain set to 6 and contour to 4. The sound I get is dirty enough and not very precise when paying rhythm guitar (I was looking for a way to come close to the deluging OD of Pixies and Placebo), while always having a fat tone for solos (the sound is powerful enough to toggle between rhythm and solo without the need of more gain).

The reverb is very warm. Surely due to it not being digital. But don't overuse it or it will drown your sound. I only use it with clean sounds because it doesn't fit my playing style with the boost channel.


I have used it since 1995 with only one accident: The connection between preamp and amp started giving some signs of struggle after several years, which resulted in a not very stable volume. But that's a known defect of the amp, you only need to connect a plug between the preamp output and the amp input and all is fine. Or you can always have it repaired, which is more expensive :-) .

What I like best: The very rich boost channel with "tube" sound, the sturdiness.
What I like least: The clean channel doesn't have enough controls (although you don't buy a Marshall for the clean sound).

With hindsight, I would buy it again, it's an excellent value for money and it''s easy to use.

KubryK's review"Very good"

Marshall 8040 ValveState 40V
Hybrid amp with tube preamp (only 1 tube) and solid-state power stage. 40W with spring reverb


Very simple, 2 channels, each with EQ, footswitch included. Ultra simple, no need for a manual.


Very good sound for this amp. Both the clean and lead channels are all right. The contour knob broadens the sound palette.


I've had it for 15 years, and only recently had to change a transistor, but that's all. They don't make amps like this with a similar price tag anymore.

Stfsatan's review (This content has been automatically translated from French)" the good old 8040 !!!!!!"

Marshall 8040 ValveState 40V
hybrid amps, a marshall 12AX7 and a transistor!
simple connections and front!
it develops 40 watts is good for the home and repeat!
classical and minimal settings: gain, bass, treble, and clear channel for gain, bass, middle, contour, treble, master volume and reverb!


the amp is simple to solve, had no manual and the sound is what the old Valvestate series: very good, compared to those of ...... mg Damn!!
the marshall is typically clear: not terrible, but the saturation surprised me: very rich midrange and highs, aggressive, large superb!


for everything that is rock, blues and metal it goes at ease
distortion is very warm and rich medium
I play a jackson dx10d, DiMarzio paf pro mounted, super distortion


it is an amp that you gave me because it did not work! Well, a lamp and a slagging later he was left for 10 years!!

DoWn's review (This content has been automatically translated from French)

Marshall 8040 ValveState 40V
hybrid lamp combo preamp / power transistors 40W.

the connection is simple
an instrument input
preamp output (PREAMP OUT)
an entry in the power (PWR AMP IN)
taking a footswitch to change channel

That's it!


Clean channel:
2 band eq

2 band eq

the level of reverb is not footswitchable 2-channel common

HP is a heavenly 12 '


the config is simple: you plug and play.
the manual is enough anecdotal findable on the site of Marshall
the sound is delivered .. Marshallian enough, but we hear about it all the time!


The sound: rock style suits the ac / dc or prong (using the 100V)

the bright, pretty flat, as often with marshall.

the distortion is Marshallian enough fat and full of promises of low volume ...

the reverb is good politics
But once you turn up the volume (repeating 'So):

On a very clear sound volume, produces a kind of power transistor Cunche very ugly.
On the overdrive channel big noise in a "desert storm" (pshhhhhhhhhhhhhhhhhhhhhhhhhhhhh).

generally, the sound is quite loud and unpleasant.


I kept this "thing" for quite some time (almost 10 years), but because it was almost all the time down, it has not been widely used.
I was using only the power section (everything thoroughly so there is no master volume) with an external preamp
because otherwise it is the cross and the banner (of his cuts, etc..).

the knobs are Critch Critch of course, one is in marchemal!

Briefly, an amp with a nice logo to trick beginners (as I was when I bought it)
flattering the sound of low volume may still be used at home to work

For anything I do not buy a thing as zero.

2424kiwi's review (This content has been automatically translated from French)

Marshall 8040 ValveState 40V
A classic combo 2 channels reverb prampli hp lamp with Celestion 12 "
only regrettable absence, a master volume, you must adjust the volume of the 2 channels


Configuration is very simple, I find two perfect channels, the clean channel
gnial is to test a guitar, really. I play with us and stratosphere
really mean anything, it is very beautiful
the saturated channel (with lamp prampli) sounds good, a little late, perhaps
I do not have the manual but I do not need either


As I have already said the two channels are all done exploitable, which is not the
For other marshall combos.
opportunity for the price around 100 euros, it's absolutely amazing
with a half volume for the clean and for the quarter saturated we can play with
a drummer.


Bought secondhand there 3 years for a hundred euros, is an amp that I will keep, never fails, no noise in the knobs, very compact, and I tried possd br /> Valvestate other combos marshall (8240, 8080, SV30) all resold see anything ...
I'm on a tomb copy copy?
I find other valuations too low, that's why my evaluation
for this combo is 10.

Nicom's review (This content has been automatically translated from French)

Marshall 8040 ValveState 40V
An amplifier with a lamp pramplification Tage (12AX7) for his leaving the power amplifier transistors.
It should be handled with care pramplification lamp, I opt for an Electro Harmonix, Sovtek but also seduced me a lot.
Here, the power of the amp gives 40W.
Connectors for any classic amp (between guitar, footswitch, line out) but also an effects loop ...
The rglage are very heels, and allow all the colors of a typical Marshall.
Switch the channel light / saturation. The strength of this amp is just what a marvel saturated channel from its quality of sound, a sound with a lot of guitar, including the low-end warmth and wonder of rock with Gibson Humbucker (490 or P100).
Reverb, but I do not use it much. It is a mechanical spring reverb, an effect that the former has a lovely hue.
Weakness, potentiometers, which seize up over time. It is normal for any amp, but it's horrible for the who will use this ampliq ue from time to time. It spits it touched. Many musicians take their place, and it is much better. I have this amp (bought new) for over 10 years (from t 1993), and that's something that through the most difficult years.


For beginners a good sound when you beginners, there's no secret ... You either hack, and it is easy and have a merdouiller its ugly ... trick, turn back to neutral and wait, repeat his ear ... Otherwise, another technique that's good, found the settings of a guitarist playing on the same type of amp / guitar and see how screwed up are the settings. If you like his game, and especially its sound to guide you around some learning difficulties.
The manual does not bring anything home, so its content was empty ...


With this amp is all about: SOUND ... indniable, a sound like a Marshall, and many colors of sound is possible. East Esssentiellement rock and blues can be, but it s not my area.
The clean channel is not great for my taste, but considering how little I use ... I manage myself satifaire with the addition of chorus-like effect or a wah-wah pedal, otherwise it means.
The channel can be saturated even met him so it's great !!... many flavors, and both his great strength, has come a long way, and means!
In overdrive, you can get a loud horn or carrment fat, so anything is possible ...


So I use it for 10 years. Therefore very robust.
One concerns the lean dry months, rgl under warranty.
Since then I only change the lamps every 2 or 3 years ... What normal ....
I opt for this model the era for its price / sound, a slaughter c'tait this era to 2500 FF / 380 Euros (I think) ... The Valvestate series allowed to play with a real Marshall sound, and without dbourser 10 000 FF / Euro 1500 ...
So for the price, yes, c'tait a very good choice, far from silent concurrency Submitted such a high price for its l.
I hsit with 8080, the big brother, but when I saw the output level with 8040, I never Exceeds 3 / 4 volume, even on stage and c'tait so much easier to "tap" in to him out the sound without becoming deaf Marshall (repeating or in small concert halls). And its small footprint, makes the amp that can easily decendre when one is on the 5th without assenceur ... This is not the case of 8080.
So ... Yes, I would do this choice.
Proof, the only thing that would make me feel like today is not to change the amp, but a great fere aqurir any lights, but also a luxury, the price diffrence does not warrant can be.

bloodsugar's review (This content has been automatically translated from French)

Marshall 8040 ValveState 40V
Preamp lamp (a 12AX7) and 40W RMS amplifier transistors in an HP 12 "(combo open back)

Ultra simple connectivity: input, preamp out (fx send), poxer amp in (fx return), line out (DI?)
2 channels Clean and Drive (switchable by a small switch on the front panel or footswitch included)
- Clean channel: gain - bass - middle - treble
- Channel drive: gain (drive) - presence - bass - treble - volume
- Gnrale reverb.

It's simple, no FFECT, no modlisation.


Ben, I RPET, no FFECT (except the reverb used sparingly) no simulation.
No manual (no need or you have a brain of chicken)
So it is very simple and intuitive trs: one branch, we play.


Sound types "lamp preamp / amp transitror" is to say, correct distortion (no Hi gain metal here) but lacks dynamics and EHJV from an all-tube amp.

The clean is dcevant (no color particulire)

The drive channel is better lotti. Is obtained easily a range of drive / crunch the slight distortion fawn mtal heavy (for the hi-gain, adding a metal zone pedals Specializes kind) but the overall color of the sound is the m me regardless of the settings (APRS if you want a sound radically DIFFERENT, change guitar logic ... at the same time.


Good amp though. I have 10 years. 2 knobs for cleaning following crachottements (classic on any amp) Otherwise it is like new. Never a worry. Good quality construction.

It ensures that all repeating with power of 40W (at beginners, when you start, you tend to donf all, but the power is sufficient, without pushing too sound, we hear).

By adding an overdrive or distortion pedals, we obtain three distinct sounds (clean home clean / crunch / distortion with pedals and sup)

A good choice of era (roughly, and there was a Fender). Now there are so many choices, so much stuff modlisation the choice is not empty. If you find it cheap on occasion is a good choice.
I will look more and probably the different MODELS dtail on offer today.
In the era, have a Marshall silent as a final conscration