Marshall Studio JTM Combo

General

• Model: ST20C Studio JTM Combo
• Series: Studio JTM
• Type: All-valve tube combo amplifier
• Power Output: 20W / 5W switchable
• Channels: Single channel with two voices
• Country of Origin: United Kingdom

Electronics & Tubes

• Preamp Tubes: 2 x ECC83
• Phase Splitter Tube: 1 x ECC83
• Power Tubes: 2 x 5881
• Effects Loop: Yes
• DI Output: Speaker-emulated DI output
• Circuit Inspiration: Original Marshall JTM45 / 2245

Speaker

• Speaker Configuration: 1 x 12"
• Speaker Model: Celestion G12M-65 Creamback
• Speaker Impedance: 16 Ohms

Controls

• Presence
• Bass
• Middle
• Treble
• Loudness I
• Loudness II
• High / Low Power Switching

Inputs & Outputs

• 4 Inputs
• FX Loop Send/Return
• DI Out
• Speaker Outputs for 4, 8, and 16 Ohm configurations

Construction

• Cabinet Material: Finger-jointed plywood
• Covering: Black levant with gold piping
• Logo: Metal “coffin” style Marshall logo