Synergy Marshall JMP 2-Channel Tube Preamp Module Black

The Synergy Marshall JMP 2-channel tube preamp module brings one of rock’s most iconic sounds into the modular era. From Clapton and Hendrix to Page and Young, Marshall’s roar has been the backbone of rock guitar for generations. At the center of that legacy is the JMP "Plexi," famous for its sparkling cleans, dynamic crunch and harmonically rich distortion. Now, Synergy and Marshall have teamed up to faithfully recreate that unmistakable voice in an all-tube preamp module. Handbuilt to capture the growl, sensitivity and touch response of a cranked Plexi, the JMP module delivers timeless rock attitude—adaptable for the stage, studio or home rig.

Dual-Channel Design With Authentic Plexi Controls

The JMP preamp module features two independent channels, each with its own set of classic Plexi-inspired controls. Volume 1 and Volume 2 replicate the original amp’s "Bright" and "Normal" inputs, letting you mix sparkle and warmth to dial in your preferred blend of attack and body. Each channel also provides a full three-band EQ, giving you interactive tone shaping that responds just like a vintage JMP. With independent Master controls, you can balance rhythm and lead tones with ease. Four Bright switches take things further, allowing you to fine-tune the treble response of each volume control—something that would normally require an amp tech to adjust.

Vintage-Era Switches for Decade-Spanning Sound

The JMP’s historic tonal evolution is built right into this module. Two vintage-era switches let you choose between ’60s and ’70s voicings, each with its own unique character. The ’60s mode delivers a smoother, rounder sound with fuller low end, perfect for bluesy leads or classic rock crunch. Flip to the ’70s mode and you’ll get a tighter, more aggressive response that mirrors the harder-edged tones of the decade’s stadium rock. Whether you’re chasing early Clapton Cream tones or the punchy riffs of AC/DC, the JMP module puts the defining sounds of two eras at your fingertips.

Innovative 0-Watt Poweramp Circuit for Real Amp Feel

To truly capture the essence of a full-sized Plexi, the JMP module goes beyond preamp circuitry. It incorporates Synergy’s unique "0-watt poweramp" design, complete with a phase inverter and transformer. This breakthrough recreates the dynamic response, punch and harmonic richness of a Marshall power section, giving you the tactile feel of an amp pushed to its sweet spot—without the deafening volume. With two 12AX7 preamp tubes driving the module, every note blooms with the organic character and detail that only real tubes can provide, ensuring an authentic playing experience that feels alive under your fingers.

Customizable Feel With Cathode Select Function

Beyond faithful reproduction, Synergy gives you the tools to shape the JMP to your personal preference. The three-way Cathode Select switch adjusts the input tube’s bass response, offering different combinations of resistors and capacitors to alter tightness and feel. This flexibility allows you to tailor the response for rhythm precision, soaring leads or anything in between. Combined with the ability to blend Volume 1 and Volume 2, tweak Bright switches and balance independent Master levels, the JMP module delivers a level of tonal customization that far surpasses the original while preserving the soul of the Plexi.

Timeless Plexi Tone, Reimagined for Modern Rigs

The Synergy Marshall JMP 2-channel tube preamp module honors the amp that defined generations of music while giving today’s players the flexibility to use it anywhere. Compact, all-tube and built to exacting standards, it integrates seamlessly with Synergy’s modular ecosystem while staying true to Marshall’s legendary sound. From expressive cleans to full-throttle distortion, from ’60s warmth to ’70s bite, the JMP module is both a faithful recreation and a modern performer. For guitarists who want the roar of rock history in a portable, versatile package, this module is nothing less than essential.