Reproducing the legendary, warm, and smooth tones of the original Marshall JTM, the Studio JTM packs a punch.

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The unrivaled number one is here, just smaller. Reproducing the legendary, warm, and smooth tones of the original Marshall JTM, the Studio JTM packs a punch. Swap between 20W and 5W at the flick of a switch and let the era-defining sound of the JTM steal the show, whether it’s playing at home, or on stage. Make sure to pair the ST20H with one of Marshall’s Studio cabinets for a small but perfectly formed Marshall rig.

The Marshall ST20H Studio JTM Head is a powerful and compact amplifier that provides the iconic JTM sound in a more portable package. With its all-valve tone, the JTM delivers the same authentic, smooth, and valve-driven break-up as traditional Marshall amps, but at lower volumes, making it perfect for home or studio use. Loaded with two ECC83 preamp valves, one ECC83 phase splitter, and two 5881 power amp valves, the amp offers the same control and versatility as older models, providing a legendary loud blend of crunch and clean recognised worldwide. The ability to switch effortlessly between 20W and 5W, along with two loudness controls, allows you to play as loud (or as quietly) as you desire.

In addition to its rich and versatile tonality, the ST20H comes equipped with a DI out and FX loop, bringing the JTM into the modern day and making it a must-have for any musician looking for classic Marshall sound and superb connectivity. The amp’s compact dimensions and weight of only 9.25kg makes it easy to transport, while the five speaker outputs and four inputs provide further flexibility and ease of use. The ST20H is a powerful, versatile, and compact amplifier that offers legendary Marshall tone and modern features, making it an excellent choice for home, studio, and stage use.

An unmistakable sound that is recognised all over the world, the ST20H is a loving homage to the amp that responded to the rock’n’roll revolution. From its legendary warm and smooth tone to blending the voices for a combination of crunch and clean, the ST20H brings the outstanding sound that Marshall is so well known for.

Accurately recreating the iconic look seen across thousands of stages over the years, the ST20H has the power of a classic Marshall amp in a new, more compact design. Packed with the same vintage tones you know and love, just in a smaller package. Features such as a DI out and FX loop have been added, bringing the JTM into the present day.

Whether you’re playing at home or an intimate gig, swap between 20W and 5W at the flick of a switch thanks to built-in power reduction technology. The 5W mode allows playing at a lower wattage without compromising on tone.





SKU: ST20H-H Categories: , Tags: , ,


Model: ST20H
Range: Studio
Technology: Valve
Channels: 1 with 2 voicings
Output wattage: 20W (with power reduction option to 5W)
Outputs: 5 x 1/4” jack sockets (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
VALVES                                                                                                                                                                      Preamp valves: 2 x ECC83, 1 x ECC83 (phase splitter)
Power amp valves: 2 x 5881
Cable: Detachable power cable included
Cable: Speaker cable included
Weight: 9.25kg / 20.4lbs
Width: 500mm / 19.7″
Height:240mm / 9.4″
Depth: 230mm / 9.1″

Delivery Information


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Unless otherwise advised, delivery will be made by a fully-insured courier service, within normal business hours. A signature at this address will be required.

The charge for delivery will be shown at the final checkout stage before final submission. Unfortunately X MUSIC IRELAND LIMITED cannot guarantee delivery times or dates. The delivery charge shown is a standard charge and does not constitute a guarantee of delivery date from the time you have placed an order.

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