Marshall SV20H Studio Vintage 1959SLP tube guitar amplifier

Marshall SV20H Studio Vintage 1959SLP tube guitar amplifier head, 20 W
Product no: 9000-0049-3222 Bax Music Warranty: This product comes with a 3-year warranty, the tubes come with a 3-month warranty.

General

Marshall's SV20H Studio Vintage is a 20-watt tube guitar amplifier head that's based on the highly-desirable and costly 1959 Super Lead Plexi. It gives you the same soundd at a more modest volume and has three ECC83 preamp tubes and two EL34 power amp tubes. It also has four separate inputs so that you can mix the high treble and normal channels (or loudness 1 and 2) if you wish.

Flexi Plexi

In terms of style, the SV20H is very similar to the 1959 SLP, but more compact. The mojo from the original model has been maintained as well with a 3-band EQ along with controls for presence, the master volume and a standby switch. Incidentally, the standby switch doesn't just turn the amp head on and off, it allows you to select 20 watts or just 5 watts, which is great for practice sessions at home. There are five different speaker outputs that allow you to connect this amp head to additional cabinets. There's also a DI out so that you can connect it directly to a mixer or a DAW, for instance. Finally, there's an FX loop on board too.

Tips or comments about this product

Please note: you will receive the SV20H only.

Specifications

Product features

Sustainable product	not specified
Amplifier type	tube
Power in Watts	16 - 20 Watts
Speaker output impedance	16 Ohms, 8 Ohms, 4 Ohms
Weight	5 - 9.9 kg
Number of speaker outputs	5
Number of channels	1
Amplifier valve	EL34
Amp modelling	no
Built-in tuner	no
Built-in effects	none
Power attenuator	yes
Effects loop	yes
Connectors	External speaker(s)
Colour	black

Weight and dimensions including packaging

Weight (incl. packaging)	11,8 kg
Dimensions (incl. packaging)	72,5 x 41,0 x 31,3 cm

Product specifications

Marshall guitar amplifier head
- series: Studio Vintage
- based on 1959SLP Super Lead Plexi
- model: SV20H
electronics
- power output: 20 W or 5 W
- preamplifier tubes: 3x ECC83 (1x phase splitter)
- power amp tubes: 2x EL34
- channel: 1
front panel
- controls: presence, bass, middle, treble, high treble (loudness 1), normal (loudness 2)
- switches: mains on/off, low/standby/high, FX loop on/off (rear)
connectors:
- low input (x2): 2x TS jack (front)
- high input (x2): 2x TS jack (front)
- 5x speaker out: jack (1x 4 ohms / 1x 8 ohms / 2x 8 ohms / 1x 16 ohms / 2x 16 ohms)
- DI output: jack
- FX loop send/return: 2x jack
- power cable
housing
- classic 1959 Super Lead Plexi look
- handle: on top
- dimensions: 230 x 500 x 240
- weight: 9.25 kg
included: power cable, speaker cable

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Reviews from other countries

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Guilhem July 25, 2025

Wrote the following about Marshall SV20H Studio Vintage 1959SLP tube guitar amplifier head, 20 W

Cet ampli est une tuerie, quelle palette de sonorités. Du coup je ne branche plus ma pédale d'overdrive tellement ça crunche naturellement.🤘🤘🤘. Attention sans atténuateur c'est très puissant pour jouer chez soi.

Description	Type	Language	Extension
Snelstartgids SV20H Studio Vintage	Quickstart	Unknown
Handleiding SV20H Studio Vintage	Manual	Dutch, English

Marshall Shrink Classics for Studio Series

Friday 25 January 2019 By Richard | Bax Music

Marshall's new compact Studio Classic, Vintage and Jubilee amp heads, amp combos and cabinets are all based on classic models like the 1959 Super Lead Plexi, the JCM800 2203 and the Silver Jubilee. Meet the SV20 Studio Vintage, the SC20 Studio Classic and the 2525 Studio Jubilee models below.