SYN20-IR / JCM 800 Bundle

All-Tube Head – 20 Watts – 3-Channel Preamp Module Platform Amp – IR Equipped

The SYN-20IR utilizes Synergy’s patented all-tube modular system, allowing you to quickly and easily swap preamp modules to endlessly expand your tonal palette. The SYN-20IR is the world’s most flexible, convenient, and tonally versatile all-tube amplifier head. The amp’s built-in vintage American-style clean channel coupled two additional channels from your favorite Synergy preamp module, makes the SYN-20IR a three-channel tonal beast ideal for every player, every style, and every situation.

Each all-tube, two-channel module is equipped with dual 12AX7s and features the exact preamp circuitry as the legendary amplifier it is based on. In most cases the SYNERGY module offers more features in comparison to the amp itself. The Synergy engineering team painstakingly works with each brand partner to design modules that achieve the most accurate tonal representation of their famous amplifier model.

NEXT-LEVEL POWER AMP CONTROL

The SYN-20IR offers unique controls for STRUCTURE and REACTANCE that tailor the response of the amp’s all-analog power section. The revolutionary STRUCTURE feature optimizes the head for any channel by offering three distinct power amp configurations and feedback which are assignable to each of the amp’s channels. The STRUTURE feature significantly alters the overall contour and feel of the SYN-20IR.

There are three Structure modes to choose from:

• Mode A: Balanced negative feedback for a clear yet punchy sound
• Mode B: Vintage style phase inverter with relaxed mids and a bright, shimmering high end.
• Mode C: Modern HiFi style phase inverter and low negative feedback resistor delivers a modern, tight feel with solid lows and a darker high end.

REACTANCE is similar to a presence knob, but with a dynamic response and variable phase inverter which simultaneously shapes the middle and treble frequencies. This powerful control helps tailor the sound to your chosen module and Structure setting.

3-BUTTON MIDI FOOTSWITCH – MIDI CONTROL

The SYN-20IR includes an easy-to-use 3-button MIDI footswitch that lets you save and access any combination of channels, amp structures and onboard IRs. With the tap of your toe, you can, for example, switch from your module’s high-gain crunch with a 4×12 IR and Structure Mode C to the amp’s onboard clean channel through a vintage 1×12 IR and the open-sounding Structure Mode A.

You can also connect external MIDI switchers and controllers, giving you access to up to 128 user-created presets. The included Synergy Editor Software makes it easy to assign and organize your presets for maximum flexibility.

SYNERGY EDITOR SOFTWARE

The included Synergy Editor Software unlocks the Syn-20-IR's full potential. Connecting via a standard USB jack, you can easily assign different IRs and Structure for your amp and module channels, load and organize your IR library, save up to 128 MIDI presets, and tailor your power amp simulation via the assignable Low-Pass and Low-Pass filtering. It's all available within the software's streamlined and easy to use interface.

Windows 7 64Bit or higher  Apple MacOS 10.15 or higher

From the moment rock ’n’ roll exploded onto the scene, one name has been at the heart of its most electrifying moments - Marshall. For generations, Marshall amplifiers have defined the sound of the electric guitar, pushing music to new heights and shaping the very essence of modern rock. From the soaring blues-rock of Eric Clapton and the incendiary performances of Jimi Hendrix to the seismic riffs of Jimmy Page, Eddie Van Halen and Angus Young, Marshall’s unmistakable roar has been the foundation of legendary tone.
At the core of this legacy stands the Marshall Plexi - an amplifier so iconic that it has remained a benchmark for tone since its introduction in the 1960s. Originally built to meet the demand for more power and volume, the Plexi starts with bold, sparkling cleans at lower settings, but as the volume is increased, it gradually transforms - first into a rich, overdriven bite and finally into the thick, harmonically rich distortion that became the voice of rock guitar. Whether it was the blues- infused crunch of the late ‘60s, the hard rock revolution of the ‘70s, the high-octane shredding of the ‘80s, or the grunge and alternative explosion of the ‘90s, the JMP remains the amp by which all others are judged.
Now, Synergy and Marshall have joined forces to bring you the ultimate tribute to this legendary amplifier. Combining Synergy’s cutting-edge patented modular technology with Marshall’s historic circuit design, this new Synergy JMP preamp module delivers the unmistakable growl, touch sensitivity and dynamic response of a cranked JMP- at any volume. Whether on stage, in the studio, or at home, this is your chance to harness the sound that built rock ’n’ roll. The legend continues. The Marshall JMP preamp module features two channels, each with Volume 1, Volume 2 and Master controls. Each channel has independent Bass, Middle and Treble, as well as Bright switch for each volume.
The JMP module features two vintage-era switches, allowing you to choose between different classic JMP models. The ’60s mode delivers a rounder, smoother JMP tone, while the ’70s mode provides a tighter, more aggressive response - perfect for capturing the evolving sound of rock across the decades. The two channels can be dialed in for variations on the same tone or for jumping between different rhythm and lead settings. Volume 1 and Volume 2 controls function much like jumping the inputs on the original Plexi, allowing for precise control over your gain structure. Additionally, independent channel master volumes let you dial in the full spectrum of Marshall Plexi tones -at any volume.

ON-BOARD PHASE INVERTER – 0-WATT POWERAMP

Think of this as our way of fitting an entire guitar amp into a preamp module. In a traditional amplifier, the preamp section shapes the tone and provides gain, while the power amp delivers the volume, punch, and dynamic response that make a tube amp feel alive. To authentically recreate this experience, the JMP module incorporates a “0-watt poweramp” design, complete with a phase inverter and a small transformer. This innovative approach faithfully captures the harmonic complexity and dynamic response of a cranked Marshall poweramp, delivering the rich tone and feel of a full-sized amp - all within a compact all-tube module.

 DUAL-CHANNEL, TUBE PREAMP

The Marshall JMP module delivers the unmistakable tone and dynamic response of one of
Marshall’s most legendary amplifiers. Designed to recreate the raw power and harmonic
complexity of the original non-master volume JMP, this module features two identical, independent channels, allowing you to dial in everything from bold, articulate cleans to rich, overdriven crunch and searing distortion. Independent three-band EQ (Bass, Middle, Treble) offers the interactive tone shaping of the original JMP, while Volume 1 represents the brighter input and Volume 2 is the darker, “Normal” input. These controls work together to craft the perfect Marshall tone, with independent master volumes on each channel to precisely balance your levels.

BRIGHT SWITCHES

The Bright switches - four in total - allow you to adjust the bright cap on each volume control. Simply put, the bright cap on a Marshall JMP influences how much high-end (treble) frequencies pass through the volume control, making the sound brighter and more aggressive. On a traditional JMP, this adjustment would require an amp tech, but the JMP module lets you customize the brightness of your Vol 1 and Vol 2 controls. By blending the two channels, you can mix the brightness of Volume 1 with the warmth of Volume 2 to achieve the perfect balance of attack and thickness.

CATHODE SELECT FUNCTION

The Marshall JMP module features a three-position switch on the PCB, which allows you to
configure the input tube bass response to match the original circuit of the selected module. These settings affect the feel and tightness. Each amp designer has a specific combination of components that make up their input tube circuit. We have selected the three most popular combinations which you can access with this switch: position 1 (1.5K resistor and 22uf capacitor), position 2 (2.7K resistor and .68uf capacitor) and position 3 (1.8K resistor and 1uf capacitor). Of course, you can experiment and try any position to see which you prefer. The JMP module is preset to position 1 (1.5K resistor and 22uf capacitor).
Synergy hardware and interchangeable preamps are protected under US patent.