Marshall Amplification

Marshall ST20H Studio JTM 20-/5-watt Tube Amplifier Head

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  • Regular price $1,749.99
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Marshall’s Studio series has long served as a guitarists favorite, as it perfectly packs many of the company’s iconic amplifier models down into compact, gig-and-studio-ready combos and heads. From the Super Lead to the Silver Jubilee, the Studio series encompasses almost the entirety of Marshall’s long history — with the ST20H Studio JTM, it reaches all the way back to the beginning. This 20-watt amplifier head precisely replicates the creamy highs, loose lows, and smoky overdriven tone of the original Marshall 2245 — the platform that arguably defined the biting sound of British blues rock, while also setting the stage for Marshall’s later amplifier creations. Plus, while it’s certainly a vintage throwback, the ST20H Studio JTM comes equipped with all the Studio series’ usual bells and whistles, including a 5-watt power scaling mode, FX loop, and speaker-emulated DI output. Vintage-inspired from the metal “coffin”-style logo to the levant front covering, the UK-built ST20H Studio JTM is a top-tier tonal tribute to the model that began the Marshall legend.


Tech Specs

  • Type: Tube
  • Number of Channels: 2
  • Total Power: 20W (5W)
  • Preamp Tubes: 2 x 12AX7 (preamp), 1 x 12AX7 (phase)
  • Power Tubes: 2 x 5881
  • EQ: 3-band EQ, Presence Control
  • Inputs: 2 x 1/4" (High Treble), 2 x 1/4" (Normal)
  • Outputs: 5 x 1/4" (4/8/16 ohms), 1 x 1/4" (DI out)
  • Effects Loop: Yes (on/off switch)
  • Power Source: Standard IEC AC cable
  • Height: 9.4"
  • Width: 19.7"
  • Depth: 9.1"
  • Weight: 20.4 lbs.
  • Manufacturer Part Number: M-ST20H-U