Unleash authentic classic rock tone with the Synergy Marshall JMP Preamp Module, designed to bring the legendary voice of the Marshall JMP into your modular amp setup. Built around all-tube circuitry and faithful vintage design, this preamp captures the harmonically rich, dynamic response that made the original Plexi amplifier a cornerstone of rock history. Whether you’re chasing smooth blues crunches or searing classic rock overdrive, this module offers tonal depth and responsiveness that players crave.
The JMP module features dual independent channels, each equipped with Volume 1 and Volume 2 controls that emulate the original amp’s bright and normal inputs. Full three-band EQ on both channels gives you interactive tone shaping from warm lows to biting highs, and independent master volumes allow you to balance rhythm and lead settings with precision. This flexible layout lets you craft everything from articulate cleans to saturated distortion with expressive control at every step.
To honor the evolution of the JMP sound, each channel includes a dedicated ’60s/’70s voicing switch — from round-bottom warmth to tighter, more aggressive bite — and four bright switch options for nuanced high-end response shaping. A selectable cathode switch adds even more tonal customization by tailoring low-end feel and tightness. Easy drop-in installation into Synergy preamp docks makes this module quick to swap into your rig, letting you explore legendary British tone alongside your favorite preamp voices.
Specifications
General
- Product: Synergy Marshall JMP Preamp Module
- Design: All-tube dual-channel preamp module
Tubes
- 2 × 12AX7 preamp tubes for rich harmonic response
- “0-watt poweramp” phase inverter circuitry emulates full amp feel
Channels & Controls
- Dual independent channels
- Volume 1 & Volume 2 per channel (Bright & Normal input emulation)
- Independent Master volume per channel
- Three-band EQ per channel: Bass, Middle, Treble
- ‘60s/’70s voicing switch on each channel
- Bright switches: adjust high-end response on Volume controls
- Cathode select switch for input bass/tightness customization
Tone Behavior
- Classic Marshall “Plexi” gain structure and dynamic response
- Responds to touch and playing nuances across gain levels
Compatibility
- Designed for easy installation in Synergy preamp docks
- Modular system compatibility with other Synergy hardware
Physical & Build
- Compact all-tube module format
- Durable construction for stage, studio or practice use
