Marshall 👑

Model: JMP 2203 😍

Year: 1977 🥳

Power: 100 Watts 💥

Serial Number: 715

The Marshall JMP 2203 Mk II Master Model Lead 100-Watt from 1977 is one of the most iconic tube amplifier heads in rock history, bridging the gap between the classic "Plexi" design and what would later become the JCM800 series.

🎛️ General Specifications

Brand & Model: Marshall JMP 2203 Mk II Master Model Lead

Year of Manufacture: 1977

Country of Origin: United Kingdom

Amplifier Type: All-Tube / Valve

Form Factor: Guitar Amplifier Head

⚡ Electronics & Power

Output Power: 100 Watts RMS

Channels: 1 Channel

Equipboard

Inputs: 2 Inputs (High Sensitivity and Low Sensitivity)

Preamp Tubes: 3 x ECC83 / 12AX7

Power Tubes:

UK / Europe: 4 x EL34 (Provides a punchier mid-range crunch)

US Imports: 4 x 6550 (Standard for US distribution in 1977; offers more headroom and a tighter low end)

Transformers: Original 1977 UK models briefly utilized the unique T3836 power transformer before transitioning to the more common T4074.

🎚️ Controls & Front Panel

Rocker Switches: Power (On/Off), Standby

Control Knobs (Left to Right):

Presence (High-frequency power amp boost)

Bass

Middle

Treble

Master Volume (Allows preamp distortion at lower overall output)

Pre-Amp Volume (Controls input gain/saturation)

🔌 Rear Panel & Connectivity

Speaker Outputs: 2 x 1/4" Jacks (wired in parallel)

Impedance Selector: Rotatable plug or selector switch for 4 ohms, 8 ohms, or 16 ohms

Mains Voltage Selector: Variable selector supporting international voltages (typically 110V, 220V, 240V)

Direct Output: None

Effects Loop: None (This era predates factory effects loops)

Equipboard

📐 Physical Dimensions & Cosmetics

Dimensions: Approximately 29" x 11" x 9" (74 cm x 28 cm x 23 cm)

Weight: Around 45 lbs (20.4 kg)

Exterior: Black Levant Tolex (Rare limited custom runs like Fawn, Purple, or Red were occasionally produced)

Front Grille / Piping: Gold plexi faceplate with large white Marshall script logo, plastic corner protectors, and a heavy-duty vinyl carrying handle

All original ✨

Except Electro-Harmonix (Russian Tubes)

Top quality ⤴️

All working perfect👌🏻

Recently set up by a pro amp tech:

For Sale 🎁 Available now at:

🔥 Freddy Guitars 🔥

🏖️ Barcelona,Spain⛵

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