Marshall Studio Series JTM ST20H 20-Watt Tube Guitar Amplifier Head
SKU: 74411769756

Marshall Studio Series JTM ST20H 20-Watt Tube Guitar Amplifier Head

Sale price$607.50 Regular price$675.00
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Description

Marshall Studio Series JTM ST20H 20-Watt Tube Guitar Amplifier HeadThe Marshall Studio Series JTM ST20H Tube Amp Head is a powerful new member in Marshall Amps' esteemed Studio amplifier range. Reimagining the first Marshall heads ever created even before the rock cornerstone 1959 SLP the Studio JTM, available in head, cabinet, and combo configurations, represents a modern interpretation of a classic amplifier. Jim Marshalls history in making amplifiers began with the JTM amplifier, a valve powered guitar head styled

The Marshall Studio Series JTM ST20H Tube Amp Head is a powerful new member in Marshall Amps' esteemed Studio amplifier range. Reimagining the first Marshall heads ever created - even before the rock cornerstone 1959 SLP - the Studio JTM, available in head, cabinet, and combo configurations, represents a modern interpretation of a classic amplifier.

Jim Marshall’s history in making amplifiers began with the JTM amplifier, a valve-powered guitar head styled after early American tweed combos that were being turned up for the first time; a groundbreaking sound that many Brits also wanted to get their hands on. Quite obviously the rest is history, with this new amplifier paving the way for the Marshall sound.

Through the Studio series of amps, Marshall has finally satisfied the request long asked for by many players - and sound engineers: make a vintage Marshall smaller, lighter, and quieter while still retaining the sonic DNA of its larger siblings. This successful line of UK-made tube heads and combos is now furthered with the JTM circuit now available in the Studio series.

The Studio Series JTM 20-watt head shares the same front panel controls as the original JTM, with two independent channels - High Treble and Normal - sharing a master presence control and three-band EQ. Each channel employs a low and high input, both channels can be used simultaneously just as a vintage Marshall would have been. Simply run a patch lead out of one channel’s input into the other channel or run a Y-cable. The Studio series JTM also features the original Marshall “coffin” logo and is dressed in a sleek black tolex and fawn grill covering, just as the vintage JTM amplifier was.

The JTM receives the Studio Series treatment by way of a low power/high power option disguised in the amp’s standby switch, allowing the player to select between a full 20-watt output or a scaled down five watts. On the back panel are a 4-, 8-, and 16-Ohm speaker outputs, a 1/4” DI out, effects loop on/off selector switch, and effects loop send and return - all features unique to the Studio Series.

In the US we call them “Tubes” and in the UK they’re “Valves”. (The “tube” is the subway in England.) Potato, pot-ah-to, this amp is all-tube driven with the same complement as the vintage JTM - two 5881s in the power section, two 12AX7s (UK calls them ECC83) in the preamp, and a single 12AX7 phase splitter.

The Studio Series JTM amplifier is here, putting the sound of the 1960s and the dawn of rock and roll and the hands of today’s players all around the world.

Shop More Amplifiers:

  • Modern Reinterpretation of the Classic JTM Amplifier
  • Two Independent Voiced Channels - High Treble and Normal
  • 20-Watt Output with Option to Scale Down to 5 Watts
  • Includes Original Marshall “Coffin” Logo and Black Tolex
  • Designed with 4-, 8-, and 16-Ohm Speaker Outputs
  • Comes with 1/4” DI Out, Effects Loop On/Off Selector
  • All-Tube Driven, Features Two 5881s and Three 12AX7s
  • Brings the 1960s Rock and Roll Sound to Today's Players
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 74411769756

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IvyLeagues
Boise, US
★★★★★ 5
Husband approved
Color: Khaki, Size: X-Large
I got this one for my husband too, and it is a really nice shirt. It has that classic Oxford look that works for a lot of situations, whether he is wearing it for work, dinner, church, or just trying to look a little more put together. The fabric feels comfortable but still has enough structure that it does not look sloppy. It is not stiff or scratchy, and the fit looks good on him without being too tight. I also like that it holds its shape well and does not seem like it will need a ton of fussing to look decent after washing. The style is simple in the best way. It pairs easily with jeans, chinos, or dress pants, so it is one of those shirts that can go a bunch of different directions depending on what he wears it with. Another solid husband shirt. Comfortable, clean-looking, easy to style, and definitely something he will actually wear.
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Reviewed in the United States on May 8, 2026
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J. Baler
Houston, US
★★★★★ 5
A great fit!
Size: 18" Neck 37"-38" Sleeve, Color: Lavender
A great fit. Good quality, great value, comfortable, and nice looking. I recommend it.
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Reviewed in the United States on May 26, 2026
A
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Alan G
Grantham, US
★★★★★ 5
Great Fit for Tall Men — Comfortable and Stylish
Size: 18.5" Neck 35"-36" Sleeve, Color: Cameo Blue
I bought the Van Heusen Men’s Tall FIT Dress Shirts in Poplin because it’s hard to find dress shirts that fit well for taller men. The fit is excellent — long enough in the sleeves and body, yet still tailored and comfortable. I especially like the blue color, which looks sharp and professional. I have already purchased multiple shirts and would definitely buy more. Very happy with these. Key Features: Tall fit designed for men with longer torsos and sleeves Classic poplin fabric for a smooth, crisp look Long sleeves with button cuffs Traditional button-down front Easy-care fabric, machine washable Available in multiple colors for versatility Modern, tailored fit that isn’t too loose Disclaimer: This review reflects my personal experience only and is not professional fashion or sizing advice. Individual fit and comfort may vary.
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Reviewed in the United States on December 2, 2025
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BruceFromFL
Belleville, US
★★★★★ 4
22" neck With good length sleeve relaxed and bent
Size: 22" Neck 37"-38" Sleeve, Color: Flame
22" neck With good length sleeve relaxed that didn't walk up forearm when arm was bent. For a fitted shirt. 22" neck was true to size but the waist is still quite large. Even with creative folding it was noticeably large waisted. Fabric is high quality and vivid color that should last. Price is Fair and a good value for this shirt. Buttons fit easily into the holes but are secure and won't come out too easily.
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Reviewed in the United States on July 8, 2025
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Frank Linux
Birmingham, US
★★★★★ 5
Nice shirt
Size: 17.5" Neck 35"-36" Sleeve, Color: Black
Fits as sized. I'm a musician, so this is very important. Good quality.
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Reviewed in the United States on April 3, 2026

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