Marshall JTM Studio ST20C 20 Watt 12" Electric Guitar Combo

The first JTM amp created a legendary sound that inspired generations of musicians. In honor of that, the ST20C brings the iconic 60's tone that initially launched Marshall to the present day, in a more compact format. Whether you're at home, in the studio, or on the big stage - the ST20C can adapt to bring exceptional tone to any situation with built-in power reduction technology, enabling players to switch between 20 Watts and 5 Watts.


  • Technology: All Tube/Valve
  • Channels: 1 with 2 voicings
  • Output Wattage: 20 Watts (with power reduction option to 5 Watts)
  • Outputs: DI output and  5x 1/4" jack sockets (16 / 8 / 4 Ohm load)
  • Inputs: 4 x 1/4" jack instrument inpts (high/low sensitivity)
  • Controls: Treble, Middle, Bass and Presence
  • Speaker Configuration: 1x12"
  • Speaker Model: Celestion G12M-65 Creamback (16 Ohm, 65 Watt)
  • Effects: none
  • Effects Loops: Yes, send/return
  • Preamp Valves: 2x ECC83, 1x Ecc83 (phase splitter)
  • Power Amp Valves: 2x 5881
  • Weight: 39.2 lbs.
  • Width: 19.7"
  • Height: 18.1"
  • Depth: 10.4"

Already have an amp, but need a cab? Want an extension cab for your combo? Check out the ST112 or ST212.