Marshall Bluesbreaker Reissue 45W 1962 preset

Close · 72/100 confidence. Most values readable. Minor gaps filled by inference from similar circuits.

The Marshall 1962 Bluesbreaker reissue recreates the legendary 1962 combo amplifier that Eric Clapton used to record John Mayall's Bluesbreakers album in 1966, considered one of the most influential electric guitar tones ever captured on record. The original Bluesbreaker had no master volume, so Clapton ran it flat-out to achieve natural power tube and output transformer saturation — a technique that defined the modern electric blues lead tone. The reissue accurately reproduces the original's tremolo circuit, tilt-back cabinet design, and class A/B output stage, making it the reference standard for British blues-rock tone.

• Years produced: 1990–2000
• Made in: UK
• Wattage: 45W
• Channels: 1
• Preamp tubes: 3× ECC83 (12AX7)
• Power tubes: 2× EL34

Known for: Eric Clapton, Paul Kossoff.

Heard on: All Your Love — John Mayall & the Bluesbreakers (1966); Hideaway — John Mayall & the Bluesbreakers (1966).

Tags: british, crunch.

Schematic-derived preset files for 16 Fractal and Line 6 modelers: Axe-Fx II/XL/XL+, Axe-Fx III, FM3, FM9, and the full Helix family (Floor, LT, Rack, HX Stomp, HX Stomp XL, Native).

Gridleak extracts amp parameters from original circuit schematics using AI vision — component values, gain staging, tone stack topology, tube types — then generates native preset files for every supported modeler. Every extraction is scored 0–100 and the score is published.