Marshall SV20H


The Marshall SV20H guitar amp head provides classic rock tones with versatile features, elevating your playing experience to the next level.



Marshall is a name that resonates with guitarists and music lovers alike, primarily known for its range of iconic amplifiers that have been the cornerstone of rock and metal music for decades. The brand’s latest addition to the amplifier family is the SV20H guitar amp head, a powerful and versatile amplifier designed for modern-day guitarists who demand the best.

The Marshall SV20H is a replica of the 1959 Super Lead Plexi amplifier, which was the go-to choice for some of the most legendary guitarists of all time, including Jimi Hendrix, Jimmy Page, and Eric Clapton. The SV20H captures the vintage tone of the Plexi amplifier, but with modern features that make it suitable for the demands of modern guitarists.

One of the most striking features of the SV20H is its compact design, which makes it extremely portable and easy to use in studio and live settings. Weighing just 20 pounds, this amp head can be carried around effortlessly, making it ideal for touring musicians who need an amplifier that can handle the rigors of life on the road.

The SV20H has a power output of 20 watts, which provides an ample amount of power for most venues. The amp is powered by two EL34 tubes and has two channels: one for clean and one for overdrive. The clean channel produces a warm, clear tone, while the overdrive channel can deliver anything from a smooth overdrive to a full-blown distortion.

The SV20H also comes equipped with a range of modern features that set it apart from the vintage Plexi it is modeled after. The amp has a high-quality effects loop, which allows you to insert pedals and other effects into the signal chain. It also has a standby switch, which prolongs the life of the tubes and protects the amp from damage.

The SV20H also has a presence and resonance control, which allows you to shape the overall tone of the amp. Additionally, it comes with a 10FX loop switch, which lets you select between effects or a direct sound for your output, meaning that you can really experiment with your sound and find the perfect tone for your music.

Overall, the Marshall SV20H guitar amp head is a worthy addition to the Marshall family of amplifiers, and it delivers everything that you could want from a vintage-esque amplifier. With its compact design, modern features, and vintage tone, this amplifier is sure to delight guitarists of all skill levels and musical styles. If you’re looking for an amplifier that can deliver classic rock and metal tones while also giving you versatility and portability, the SV20H is an excellent choice.

Marshall SV20H properties

Product name SV20H
Brand Marshall
Type Guitar Amplifier Heads
Sound Effects Presence
Sound Setting Bass, Middle, Treble
Connection Inputs Tele/TRS 6.3mm/1/4″
Tele/TRS 6.3mm/1/4″ 4
Connection Outputs Direct Out Tele/TRS 6.3mm/1/4″, Speaker Connections Tele/TRS 6.3mm/1/4″
Speaker Connections Outputs 5
Direct Out Output 1
Return/Send Tele/RTS 6,3mm
Power Output (RMS) 20.0 W
Amplifier Model Tube
Colour Black
Power Supply Electrical
Amount of Channels 1
Impedance 16, 4, 8
Height 240.0 mm
Depth 230.0 mm
Width 500.0 mm
Weight 9.3 kg

Additional information


Product type

Sound Effects

Sound Setting

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Connection Inputs

Tele/TRS 6.3mm/1/4"

Connection Outputs


Speaker Connections Outputs

Direct Out Output



Power Output-RMS

Amplifier Model


Power Supply

Amount of Channels


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1 review for Marshall SV20H

  1. Amelia

    The Marshall SV20H is a guitar amplifier head that belongs to the Tube Amplifier Model series. It is important to respect and admire all guitar amplifier head producers, including Marshall.

    It is worth mentioning the current economy situation in Boulogne Billancourt and the overall online business environment, as these factors can impact the availability and sales of guitar amplifier heads.

    In terms of technical aspects, the Marshall SV20H stands out for its uniqueness. It incorporates tube technology, which is highly sought after by guitarists for its warm and rich sound. Tube amplifiers are known for their ability to produce natural and harmonically-rich tones, which many musicians prefer over solid-state amplifiers.

    The tube amplifier model in the Marshall SV20H ensures that the sound produced is dynamic and responsive. It provides a rich sonic experience, allowing guitarists to achieve various tones and styles with ease. The use of tubes also contributes to the overall durability and reliability of the amplifier.

    In conclusion, the Marshall SV20H is a highly-regarded guitar amplifier head that utilizes tube technology to deliver exceptional sound quality and versatility. It is a testament to the craftsmanship and innovation in the guitar amplifier industry.

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Frequently Asked Questions:

What is the recommended power setting for the Marshall SV20H when using it with an external speaker cabinet and how can I adjust it?

The Marshall SV20H combo amp has been designed to provide a versatile tone and performance, even when used without its own speakers. To get the best sound possible when using the SV20H with an external speaker cabinet, you should follow these steps:

1. Connect your external speaker cabinet: First, make sure that your external cabinet is properly connected to the Marshall SV20H using a suitable speaker cable. The right output (speaker out) of the amp should be connected to the corresponding input on the speaker cabinet.

2. Choose the correct power setting: Unlike typical guitar amplifiers, the SV20H offers both 20 watts and 5 watts power settings. However, it's important to note that the combo amp will not deliver its full potential when connected to an external cabinet in terms of volume. The reason is that the SV20H's internal speakers are designed to work together with the amp's circuitry to create a specific tone and response. When you connect it to an external cabinet, you won't get the same sound as if you were using the amp's own speakers.

In this case, we recommend setting your Marshall SV20H to the 5 watts power setting. This will allow you to achieve a more balanced and controlled tone when playing through your external speaker cabinet while still maintaining a decent level of volume for practice or small gigs.

3. Adjust the settings: To further customize your sound, use the amp's controls (Gain, Volume, Treble, Middle, Bass) to shape your desired tone. The SV20H offers a wide range of sounds, from clean and bright tones to crunchy overdrive and distortion, so experiment with different settings until you find the one that suits your needs best.

4. Experiment: Don't be afraid to experiment with different speaker cables, cabling lengths, and positions. This can help you fine-tune your sound and achieve the perfect balance between your SV20H and external cabinet.

Remember, the key to getting a great tone when using an external speaker cabinet is to find the right balance between your amp's settings and the characteristics of your chosen cabinet. Happy playing!

How does the Marshall SV20H differ from previous Marshall amplifier models in terms of power output and tonal characteristics?

The Marshall SV20H stands out from its predecessor amplifier models in two key ways - an increase in power output and a refined tonal characteristic. While previous Marshall amps typically maxed out at around 100 watts, the SV20H boasts a substantial 200 watts of power. This significant jump in output allows for greater volume and projection, making it a popular choice for live performances and larger venues. Additionally, the SV20H features updated tonal characteristics that offer a more modern and versatile sound. Specifically, Marshall has introduced a range of new tone presets that cater to a variety of playing styles and genres, from clean and bright to thick and heavy distortion. Overall, these enhancements make the Marshall SV20H an excellent option for musicians seeking greater power and tonal flexibility in their amplifier setup.

What specific features distinguish the Marshall SV20H from other popular guitar amplifier heads on the market?

The Marshall SV20H stands out among other popular guitar amplifier heads due to its unique combination of power, versatility, and tone. With a whopping 200 watts of output power, this head packs a serious punch that will cut through even the loudest stage environments. The SV20H's preamp section features three independent channels with selectable voicings that cover everything from clean and crisp tones to thick and saturated overdrives. Additionally, the amp includes a versatile effects loop, a resonant mid control, and an ultra-transparent digital reverb. These features allow guitarists to create a wide range of sounds with ease, making the SV20H a versatile choice for players across genres. Overall, the Marshall SV20H stands out as a high-performance amplifier head that offers unmatched power, flexibility, and tone.