Synergy Amps OS Preamp

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$399.99 to $1,459.99

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Page last updated Jul 03, 2026

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$1,459.99

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$359.99 5 available Used

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4.7 (6)

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Description

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Unlock the legendary tone of the Dumble Overdrive Special with the Synergy Amps OS Preamp. This all-tube preamp module channels the iconic sound renowned for its dynamic range and unparalleled clarity, straight into your rig without breaking the bank. Ideal for both studio and stage, the Synergy OS preamp captures the essence of the Dumble experience, offering dual channels that deliver both shimmering cleans and the coveted overdriven growl.

Equipped with intuitive controls, the front panel mimics the classic Dumble layout, including Bright, Deep, and Rock/Jazz switches, alongside a comprehensive 3-band EQ. This enables precise tonal shaping while preserving the signature Dumble character. The dual footswitchable channels allow seamless transitions between the crystal-clear clean tones and the smooth, singing sustain that defines the Overdrive Special's legacy.

Whether you’re chasing the mythical tones favored by guitar legends or crafting your own unique sound, the Synergy OS preamp module offers the perfect balance of affordability, authenticity, and adaptability. It’s not just a piece of gear; it’s a gateway to the soundscape of legends.

Key Features:

Based on the Dumble Overdrive Special amplifier
Two channels for clean and overdrive tones
Equipped with 2 x 12AX7 preamp tubes
Controls: Bass, Mid, Treble, OD Level, OD Ratio, Presence, Master, Volume
Switches: Bright, Deep, Rock/Jazz
Easy integration with Synergy preamp docks
Dual/Single switch compatibility with older Egnater and Randall systems

Product specs

Available since	October 2019
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

FAQs

What type of tubes does the Synergy OS Preamp use?: The Synergy OS Preamp utilizes vacuum tubes, which are essential for delivering its warm, dynamic sound characteristic of classic tube amplifiers.
Does the Synergy OS Preamp include built-in effects?: No, the Synergy OS Preamp does not feature any built-in effects. It is designed to provide pure preamp tones without additional effects processing.
Is the Synergy OS Preamp suitable for direct recording?: The Synergy OS Preamp does not have a direct out feature, so it is not directly suitable for recording without additional equipment like a load box or speaker simulator.
Can I control the Synergy OS Preamp via MIDI?: The Synergy OS Preamp does not include a MIDI interface, so it cannot be controlled via MIDI.
Does the Synergy OS Preamp support amp modeling?: No, the Synergy OS Preamp does not support amp modeling. It focuses on delivering authentic tube-driven preamp tones.

Videos

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EytschPi42

A DUMBLE for 399? Synergy OS Module - Review

EytschPi42

Synergy OS - Most Underrated Module?

Leon Todd

SYNERGY OS Module

SynergyAmps

SYNERGY OS Module

SynergyAmps

Reviews

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PROS

Versatile tones from jazzy cleans to high gain distortion
Unique overdrive channel with detailed control via OD Level and OD Ratio
Excellent dynamics, responds well to different pickups and playing styles
Clean channel offers both thick, warm tones and bright, jangly sounds
Notably great sustain on the overdrive channel
Presence control effectively fine-tunes the sound
Compatible with a wide range of cabinets and power amps
Effective EQ section, though shared between channels
Can emulate expensive, mythical amplifier sounds affordably
Rock/Jazz switch adds significant tonal versatility

CONS

Overdrive channel's controls may be confusing initially
Volume balancing between clean and overdrive channels can be tricky
EQ section shared between channels, limiting independent tone shaping
Potentiometers feel light and not very durable

Owner Insights

We analyzed real musician discussions from forums and Reddit to find what players love, question, and tweak about Synergy Amps OS Preamp.

Features and functionality

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The Syn-1 includes an FX loop that integrates well with pedals and drive pedals, enhancing versatility in setups.
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Synergy modules are designed by the original designers, ensuring close tonal fidelity to their standalone counterparts.
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Synergy modules provide a high density of channels, offering 4 channels per 1U rack space, which is particularly beneficial for those with limited space.
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Use cases and applications

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Running the Syn-1 into an audio interface via cab sim DI avoids clipping issues, offering a robust direct recording solution.
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The system is praised for its flexibility, allowing users to transform backline amps with the press of a footswitch.
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Ideal for studio work, the Synergy setup is favored for its ability to easily add channels to existing amps, offering broad tonal expansion.
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A user successfully employs a Synergy system in a wet-dry-wet setup, combining it with a Headrush Prime modeler for reverb and effects, highlighting its versatility.
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User experience

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Owners appreciate the system's tonal quality, even when running directly into an audio interface, highlighting its effectiveness in recording environments.
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One owner has accumulated eight Synergy modules, emphasizing the appeal of their tonal variety, with favorites including Dr. Z Zwreck and Friedman DS modules.
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Build quality

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Concerns exist around the reliability of Synergy's chassis-mounted components and ribbon cables due to their compact and intricate layout, although no significant failures reported yet.
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Comparisons

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Synergy modules are compared to Triaxis preamps for channel density, offering a modular alternative to traditional tube amps.
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Artist usage

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Björn Gelotte

Guitarist

In Flames

Verified via YouTube

In the YouTube video titled "Rig Rundown with Greg, guitar tech of Björn Gelotte of IN FLAMES 2024" by KLOTZ AIS, the Synergy Amps OS Preamp is identified as the clean channel module used by guitarist Björn Gelotte. It is clearly visible at the 4:14 timestamp.