Marshall Studio Classic SC20H


This item runs exclusively on an operating voltage of 230 V and therefore requires a voltage transformer to run in your country of United States.

Tube Head

  • Preamp based on the classic JCM 800 2203
  • 20 Watts with power reduction to 5 watts
  • Tubes: 2x ECC83, 1x ECC83 (Phase Splitter), 2x EL34
  • Controls: Preamp and Master Volume, Treble, Mid, Bass and Presence
  • 1 Channel with high and low sensitivity inputs
  • DI out
  • Serial FX loop
  • Dimensions: 510 x 240 x 240 mm
  • Weight: 9.7 kg
  • Suitable case: Art.501854 (not included in delivery)
Available since March 2019
Item number 457019
Sales Unit 1 piece(s)
Power 20 W
Power Amplifier Tubes EL34
Channels 1
Reverb No
Footswitch No
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JCM 800 2203 in a compact package

The Studio Classic SC20H delivers the legendary look and sound of the “2203” amps from Marshall’s JCM 800 series in a compact format that is quiet enough for bedroom use. This 20-watt head is equipped with three ECC83 preamp tubes and two EL34 power amp tubes, and it can be switched down to 5 watts in low-power mode, allowing players to enjoy classic JCM tones even at low volume. Compared to its bigger brother, the Studio Classic 20H has been expanded to include a few extras, including a DI output with cabinet simulation for direct recording. Otherwise, however, the Studio Classic 20H retains the same features as its 100-watt sibling, including four EQ controls and both preamp and master volume controls.

Controls on the Marshall Studio Classic SC20H Tube Head

JCM tone at moderate volume

Since they were launched in the mid-1970s, the sound of Marshall’s JCM 800 2203 amps has become an indelible part of Rock music history, and the SC20H delivers precisely this sound and character – not quite as loud, admittedly, but still with enough power to hold its own in the rehearsal room and on stage. The output power can be reduced from 20 watts to five watts via the three-position standby switch, which makes it possible to enjoy fully authentic JCM sounds at moderate volume even with the master volume control cranked as high as it will go. The highly effective three-band EQ section, complete with a Presence control, provides additional options for effective tonal adjustment, while the series effects loop allows modulation effects to be seamlessly integrated into the signal path.

Closeup of the Marshall Studio Classic SC20H Tube Head

A great alternative for on the go

The original 100-watt 2203 amps are legendary, but their weight and size mean that getting them from A to B can be a nightmare. On top of that, the immense power that these amps have in reserve is seldom needed and serves only to annoy the rest of the band in rehearsal and the sound engineer during live gigs. This is where the SC20H comes into its own, combining the authentic tone and outstanding dynamics of its bigger brother with a significantly more manageable weight and more compact dimensions. Measuring just 510x240x240mm and weighing a mere 10 kilogrammes, this diminutive amp head is easy to store away and can be set up quickly for a performance on stage. The DI output can also be easily routed to the mixing desk or audio interface in the studio.

Marshall logo on the Studio Classic SC20H Tube Head

About Marshall

Marshall, the manufacturer from Milton Keynes in Great Britain, is an indispensable figure in the world of electric guitar. The tube amplifiers of company founder Jim Marshall († 2012) have been writing Rock music history since 1962 with names like Pete Townshend, Jimi Hendrix, and Eric Clapton. The classics of the JTM, JMP, and JCM 800 series are still highly sought-after today, as they shaped the sound of overdriven and distorted electric guitar more than any other product. To this day, the combination of the amp and 4x12" cabinet - the "Marshall stack" - is synonymous with the energy and power of the Rock music genre. Alongside these landmark achievements, however, Marshall has always kept its finger on the pulse of the times and a close eye on the needs of up-and-coming musicians.

100% Marshall – even for home use

When paired with a sufficiently large speaker cabinet, the Marshall SC20H is easily up to the task of getting heard at live gigs and – like a true Marshall – will cut through perfectly in a band context. It will make an equally good impression when switched from 20 down to five watts and connected up to a small cab, allowing you to enjoy all the delights of that classic JCM sound in your living room. Whether you are playing any of the many Blues styles, Rock, Hard Rock, or even adding a boost or overdrive to play full-on Metal, the SC20H is indubitably a true Marshall JCM amp that continues the illustrious tradition while also adding a few useful extras.

Connections on the Marshall Studio Classic SC20H Tube Head

63 Customer ratings

4.8 / 5

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40 Reviews

Overall very happy with sound and function. Finishing on the product disappointing
C0norF 08.05.2020
Very happy with sound and use but sloppy finishing letting the brand down

For the price I paid there is some sloppy finishing on the front of the amp. The tolex was not cut clean on either of the front corners. One side is not allowing the front panel to come flush to the front of the case and on the other side the fibers protruding from inside the tolex layer were left untrimmed. A nail/tack in the corner guard was poorly installed with the hammer, thus leading to a ding in the plastic. The white piping on one side is not perfectly fitted to be flush with the gold from panel. This is disappointing sloppiness at this price-point. I recently had a DSL20H (had to return with a channel switching relay popping issue) and decided to go for this higher quality item instead. The finish on the DSL20 was better than this SC20H!!!! However these imperpection are simply imperfections and not noticeable unless you are looking for them. Disappointing though Marshall.

On to the main use - the function and sound.....
I'm very happy with how this amp sounds and having done a lot of research I'm more comfortable with a one channel amp. I can hit the front of the amp with a cheap tube-screamer clone and the amp will do an awesome 80s thrash vibe. I can on/off an EQ pedal out front with the level set to minimum to simulate rolling off the volume on the guitar to get a cleaner tone & simulate a 2 channel setup (Note: the level drop with an EQ is not the same as rolling the guitar pot down all the way - there are pedals out there that will drop the db of the signal even more to get even cleaner). I love the sound of the amp and the distortion is much more pleasant than the DSL20. I think if you are looking at both of these amps and wanting to play early metallica, megadeth etc then this is a better choice for the sound. You do need to hit it out front with the pedal though (cheap pedal for €23.90 ;-) works well here). Ok it's a lot dearer so there is that - but if you can afford either then I can say this is worth the extra cash. The sounds for classic rock are much nicer on this than on the DSL also in my opinion. Lastly on this - it's less bright. the DSL nearly took the enamel off my teeth with the treble. This amp is still on the bright side but way more manageable and pleasant. The other thing I can do, which I don't see many saying online is that I can use the EQ out front and drop the level on it to minimum while pushing up the master volume on the amp to drive the power tubes harder - without blowing my head off. This amp is very loud even on 5W mode at 1 on the master and 10 on the preamp. The proper way to do this of course is to purchase an expensive attenuator with a reactive load, but to be honest this is not a bad "poor man's way" of getting some more balls out of the amp in a much more affordable and simple way (another €23.90 gets you a perfectly good EQ pedal :-) [Note: I'm using this amp at home mostly, if you are gigging or practicing well then turn the thing up to 3 and they'll hear you in the next parish!]

The only (small) downsides/considerations on the functionality side are:
1. No reverb on-board. It's nice to have a simple way to bring in some reverb on an amp itself if you just want to plug in to the amp and play (even if it's digital and can be turned off & out of the circuit). However I will say that I don't miss the reverb much on this amp. It has a "vibrance" to it's tone. You would miss the reverb significantly on an amp with a very dry clean signal. You won't miss it as much here unless you specifically want a decent amount of reverb for your particular song/sound.
2. The FX Loop is not footswitchable. Not important for me but might be for others. The loop knocks the signal down -10dB to be pedal friendly in the loop, which is probably a good thing. Does it suck tone? I dunno, I'm pretty happy using the fx loop. you can take the fx loop out of the circuit with a switch on the back.
3. The FX loop is after the master volume. This is interesting because if you want to run into the FX Loop Return, bypass the pre-amp and just use the power amp you will need external level controls because your amps master volume is now useless. You are at full volume if you go into the return on this amp - well full volume minus 10dB!! - see above. Maybe this is not a downside as such - just thought it was interesting to know. It's how the circuit is designed - you probably have something with a level on it if intending to use it this way anyway. MT2?!


Xraiser 30.05.2020
I was looking for an all tube amp that I could use at home to record. After tens of videos and comparisons between this one and the other 20w Marshall versions (silver jubilee and vintage) I realised this one was the best for me.
You really need an attenuator to play it at home. I got the Bugera PS1. While it can steal some of the tone, it still sounds brilliant.
- Sound is great, for the price you cannot get a better classic JCM 800 sound.
- light weight compared to the 100W;
- sounds really good with pedals;
- it's a JCM800;
- low switch doesn't really make it more practical so it's kind of useless. Still sounds loud and the tone suffers;
It has only one channel but you can easily get a clean tone by rolling off the volume knob on the guitar.
Mine cracks a bit just when powering it on. Not sure if it's a general or normal thing, sounds like some filaments are warming up.
I would recommend getting this if you are more into high gain playing style. If you play mostly clean, check the vintage.


Marshall classic
KrznaRich 11.02.2021
This is my first Marshall amp, and, for me, this is great little amp. I use it at home, and sounds great, for what I need. Its easy for handling, quality is good, and offer master volume, whitch seems nice to me.


The GREATEST Amp ever...!
Doooosu 11.06.2022
GREAT... There is nothing I can say more!!!


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