Two Channels of Pure Plexi Bliss
Born in the late 1960s, the Marshall JMP — a.k.a. the Plexi — delivers what's arguably the most iconic tube-fueled crunch in guitar history. The Synergy Marshall JMP packs this legendary sound into a convenient 2-channel preamp module, enabling you to harness the classic British-infused voice used by such influential players as Jimi Hendrix, Jimmy Page, Paul Kossoff, and Eric Johnson. Loaded with two 12AX7 preamp tubes, the Synergy module injects your playing with the same aggressive midrange bite, punchy low end, and crisp highs as the full-size amplifier. Moreover, the built-in Zero Watt power amp section allows it to replicate the original amplifier's phase inverter circuitry. This full-featured module brandishes two identical channels, each with Vol. 1 and Vol. 2 controls, enabling you to access the original amplifier's input-jumpered configurations. You also get per-channel Bass, Middle, Treble, and Master volume controls. Moreover, per-channel '60s/'70s switches enable you to toggle between early- and later-era JMP tones, and you get two Bright switches for each channel. You also get a 3-position cathode select switch for configuring your input tube bias setting. Players with a serious craving for classic British crunch will find the Marshall JMP module endlessly satisfying.
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The JMP legacy lives on
The Synergy Marshall JMP module faithfully captures the tone, power, and harmonic richness of the iconic non-master volume JMP amplifier, offering two identical, independent channels for a wide range of sounds, from bold, articulate cleans to saturated crunch and searing high-gain. Each channel features its own 3-band EQ for authentic tone shaping. Moreover, the Vol. 1 and Vol. 2 knobs replicate the original amplifier's Bright and Normal input volumes, enabling you to blend them seamlessly — no input jumpering required. Additionally, Master volume knobs allow you to attain a precise level balance between the channels. Finally, four Bright switches allow easy adjustment of the bright caps — traditionally a job for an amp technician — facilitating fine-tuning of your high-end response. By blending the two channels, players can craft a custom mix of brightness and warmth, achieving the ideal balance of attack and body.


Synergy Amplification: a tube-fueled alliance
Merriam-Webster defines synergy as "a mutually advantageous conjunction or compatibility of distinct business participants." With Synergy Amplification's consortium of tube-amp talents that includes Dave Friedman (Friedman), Joe Morgan (Morgan), Steven Fryette (Fryette and VHT), Mike Soldano (Soldano), and Peter Diezel (Diezel), the name is a perfect fit. Each product is painstakingly crafted by these titans of the tube-amp world, ensuring every nuance of their legendary amplifiers is translated to your tone. For the most iconic tones in the most convenient package possible, Sweetwater is proud to offer you Synergy Amplification.
Synergy Marshall JMP Features:
- Twin 12AX7-loaded preamp module based on Marshall's legendary JMP
- Delivers the same aggressive midrange bite, punchy low end, and crisp highs as the full-size amp
- Built-in Zero Watt power amp section replicates the original amp's phase inverter circuitry
- 2 identical channels with dedicated Bass, Middle, and Treble controls
- Vol. 1 and Vol. 2 knobs on each channel replicate the original amplifier's Bright and Normal input volumes
- Independent Master volume knobs allow you to attain a precise level balance between the channels
- Per-channel '60s/'70s switches enable you to toggle between early- and later-era JMP tones
- 4 Bright switches allow easy adjustment of the bright caps
- 3-position cathode select switch for configuring the input tube bias setting