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Marshall ST20C Studio JTM Valve Combo Amp 20W - Black

Original price $2,399.99 - Original price $2,399.99
Original price $2,399.99
$2,399.99 - $2,399.99
Current price $2,399.99
Available to order
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The first JTM amp created a legendary sound that inspired generations of musicians. In honour of that, the ST20C brings the iconic 60’s tone that initially launched Marshall to the present day, in a more compact format.

Whether you’re at home, in the studio, or on the big stage – the ST20C can adapt to bring exceptional tone to any situation with built-in power reduction technology, enabling players to switch between 20W and 5W.


An unmistakable sound

This reissue painstakingly reproduces the legendary, warm, and smooth tone of the original Marshall JTM that inspired generations of musicians. The ST20C delivers the loud blend of crunch and clean recognised the world over.

Low-wattage vintage sound

Ideal for creating that definitive vintage tone, the ST20C is equipped with a Celestion Creamback G12M-65 speaker. Switch between 20W and 5W at the flick of a switch to allow playing at a lower wattage without compromising on tone.

Small but mighty

Packed with the same vintage tones you know and love, just in a smaller package, the ST20C has the power of a classic Marshall amp in a compact design.

Handmade in the UK

Built in the same UK factory just like the original, the ST20C is adorned with period-correct aesthetics - from the same distinctive, solid metal, red enamel poured “coffin” logo, to its fawn fret complete with gold piping and beading, the ST20C beautifully nods to the 60s. 

Model ST20C
Range Studio
Technology Valve
Channels 1 with 2 voicings
Output Wattage 20W (with power reduction option to 5W)
Outputs DI output and 5 x 1/4” speaker outputs (16Ω load / 8Ω load / 4Ω load)
Inputs 4 x 1/4" jack instrument inputs (high/low sensitivity)
Controls Treble, Middle, Bass, and Presence
Effects None
Effects Loop Yes, send/return
Speaker Configuration 1x12”
Power Handling 65W
Speaker Model Celestion G12M-65 Creamback (16Ω, 65W)
Unit Impedance 16Ω
Preamp Valves 2 x ECC83, 1 x ECC83 (phase splitter)
Power Amp Valves 2 x 5881
Cable Detachable power cable included
Dimensions (including feet and handle)
Weight 17.8kg / 39.2lbs
Width 500mm / 19.7"
Height 460mm / 18.1"
Depth 265mm / 10.4"