Marshall ST20H Studio JTM Head

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Key Features

Get the authentic Marshall sound on-the-move
Effortless to transport thanks to compact and lightweight design
Fine tune your sound from clean to overdrive courtesy of equalisation controls
A flexible and adaptable setup provided by DI out and FX loop

Marshall ST20H Studio JTM Head Overview

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.

Product Ref: 235527

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With its one channel and four inputs, the Studio JTM Head is a highly versatile amplifier that offers a range of equalisation controls to shape the sound of your guitar performance. Featuring treble, middle, bass, and presence controls, this amp head allows you to fine-tune your tonal characteristics, enabling you to achieve everything from sparkly cleans to roaring overdrive.

Its four inputs make it easy to switch between guitars or to adjust the gain level, depending on the style of music you're playing. What's more, the equalisation controls are also highly responsive, meaning you can dial in the perfect tone for your particular playing style. With an all-valve design, this amp head delivers a rich, responsive sound that reacts to your playing dynamics, making it a great option for guitarists who want to achieve classic Marshall tones in a compact and modern package.

An all-valve construction

Valves are an essential component of the Marshall ST20H, and they play a crucial role in producing the incredible sound. This amp head is loaded with two ECC83 preamp valves, one ECC83 phase splitter, and two 5881 power amp valves.

Its preamp valves are responsible for taking the signal and amplifying it to produce the desired tone. They also give the signal a more three-dimensional quality, adding warmth and richness to the sound. The phase splitter valve then takes the signal and splits it into two - the signals are then sent to the power amp valves.

These then take your signal and amplifies it to the speakers, providing the classic Marshall sound that has been recognised the world over. The 5881 power amp valves are known for their ability to produce rich, warm tones at high volume levels, while also retaining clarity and definition. This means that even when you turn up the volume on the Studio JTM Head, the sound remains crisp and focused.

Perfect for gigging musicians

The Marshall ST20H is an excellent amplifier for gigging musicians, thanks to its compact and portable design. With dimensions of 24cm in height, 50cm in width, and 23cm in depth, and a weight of only 9.25kg, this amp head is incredibly easy to transport. Whether you're traveling to a local gig or touring the country, you can easily take the Studio JTM Head with you wherever you go.

Despite its small size, the Studio JTM Head packs a powerful punch, delivering the classic Marshall sound that has made the brand so famous. With its all-valve tone and range of tonal possibilities, this amp head is a great choice for guitarists looking to achieve a rich, responsive sound that reacts to their playing style. In addition to its portability and tonal quality, the Studio JTM Head is also highly versatile, with features such as a DI out and FX loop that bring the JTM into the modern era.

The JTM legacy

The Marshall JTM series is an iconic line of amplifiers that played a vital role in shaping the sound of rock music. Introduced in the mid-1960s, these amps quickly became popular among guitarists due to their unique tone and appearance. The JTM was the first amplifier designed by Jim Marshall, who wanted to create an amp that could deliver the American tones with more gain and distortion.

This amp quickly gained popularity as it provided guitarists with the ability to produce a raw and aggressive sound that had not been heard before. It became a favourite among musicians such as Eric Clapton, Jimi Hendrix, Pete Townshend, and many others, who used it to achieve their signature sounds. It is also notable for its gold plexiglass front panel and distinct control layout that have become synonymous with the Marshall brand.

Over the years, the JTM underwent several modifications, and newer models were introduced. Still, the original design remains highly sought after by guitarists looking to achieve that classic Marshall sound. Thanks to its rich history and massive contributions to music, the Marshall JTM has become an iconic piece of equipment that is widely recognised as one of the most influential amplifiers ever made.