Synergy Marshall JCM 800 Preamp

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Pre-Amp Module for Synergy System

Channels: 2
Synergy and Marshall have teamed up to create this preamp based on the Marshall JCM 800 (2203 / 2204 Vertical Input)
Built-in 0-watt power amplifier and phase inverter for an authentic amp feel
Cathode selector switch on the circuit board for adjustable tube reaction
Tubes: 3 x 12AX7
Controls: 2 x Preamp, 2 x Bass, 2 x Middle, 2 x Treble, 2 x Presence, 2 x Volume
Switch: 2 x High/Low Gain, 2 x Bright
Dimensions (W x D x H): 178 x 140 x 38 mm
Made in USA

30-Day Money-Back Guarantee

3-Year Thomann Warranty

Available since April 2026
Item number 639257
Sales Unit 1 piece(s)
Design PlugIn Module
Tube(s) Yes
Amp Modeling No
Effects No
Headphone Output No
Direct Out No
MIDI Interface No
Integrated Expression Pedal No
Connections for Pedals or Switches No
Aux-Input No
Integrated Tuner No
USB-Port No
Drum-Computer No

€499

All prices incl. VAT

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in Electric Guitar Preamps

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5 6 Customers 4 0 Customers 3 0 Customers 2 0 Customers 1 0 Customers

5 / 5

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4 Reviews

One of the best

vekiHR 02.10.2026

With this preamp module for the Synergy system, Marshall has outdone themselves. The sound is 100% like a cranked, highly exceptional example of a JCM800 head—far above your average namesake head, digital modelers, etc.
Just like other modules, there are 3 mods on the PCB that alter the circuit, offering:
1. A Plexi-like vintage option with the least amount of gain.
2. 100% factory JCM800 in the middle position.
3. A modded Marshall tone closer to a Friedman, featuring more bass, gain, and definition... this one absolutely kills.
It also features 3 tubes—one more than other modules. While it isn't my personal number one favorite module, for thrash, old-school death metal, and other styles where you don't need insane articulation, it doesn't get any better than this. Regardless, it is actually more articulate than the original head because it includes a 3-way bright switch.
It delivers that primal, organic metal sound of the 80s, 90s, and 2000s, as well as vintage, classic rock, hard rock, blues, and more. The sheer width of the Marshall sound is massive. It takes pedals brilliantly and works phenomenally well with 7 and 8-string guitars!

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Could not say enough to convince you...

clark81 25.04.2026

After owning an original 1984 JCM 800 2203, after combining this module with the SYN-20IR, i had the same feeling. At a reasoneble volume also.
Forget all the modellers and sims, this is the real spirit of rock n roll in a small package.

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Wow.

chr1stoph 20.04.2026

Ich bin wahrscheinlich einer der ersten, die dieses Teil nach Veröffentlichung zu Hause haben, und ich kann es nicht anders sagen: Einschrauben, Akkord spielen, weggeblasen sein.

Ich hatte das Erlebnis schon mit meinem ersten Synergy-Modul, dem SLO II. Und jetzt wieder. Ich hab auch einen Kemper, ich probiere gerne Profiler und Modeler aus, aber diese Art von "wow!" krieg ich einfach nur von echten Amps. Ich hatte nie einen JCM800 zu Hause oder im Proberaum, ich kenne ihn also nur als tausendfach nachgeahmtes Modell und fand das oft schon toll. Aber dieser Kollege hier... wow.

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