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Synergy Friedman DS - 2 Channel Pre-amp Module
Dave Friedman is the man behind some of the most impressive tones in rock ‘n’ roll, and has been for over 25 years.

Dave Friedman is the man behind some of the most impressive tones in rock ‘n’ roll, and has been for over 25 years. Throughout that time, luminary players such as Jerry Cantrell and Steve Stevens have been relying on Friedman’s amplifier modifications, repairs, and builds to keep them sounding at the top of their game.
A cornerstone in the Friedman Amplification lineup, the Dirty Shirley seamlessly merges the vintage rock tones of late '60s England with the articulate and crystalline high-gain tones synonymous with the Friedman Empire. This single-channel tube amp establishes a benchmark for touch sensitivity, responding dynamically as you ease off your pick attack or dial down your guitar's volume. It serves as an exceptional platform for a diverse range of stomp boxes. While it excels in delivering classic rock crunch, the Dirty Shirley is equally adept at running cleaner, yet it can summon enough grit to stand its ground in old-school metal. Representing the epitome of "less is more" in rock 'n' roll, the Friedman Dirty Shirley captures the essence of versatility and tonal finesse.
If you're a contemporary player seeking that timeless classic rock sound filled with rich harmonics, the Synergy Friedman DS preamp is your go-to choice. Unlike other preamps aiming to emulate specific amplifier tones, this one is meticulously crafted by Dave Friedman himself to capture the precise tone and feel of his Dirty Shirley amps. Featuring two 12AX7-powered channels, the DS module provides even greater versatility than Friedman's original tube head. Whether you dial in one channel for a touch of grit and the other for a sumptuous lead tone, it's like having two Dirty Shirleys at your fingertips. Immerse yourself in Dave Friedman's interpretation of the perfect vintage guitar tone with the Synergy Friedman DS Preamp.
The Synergy DS pre-amp features two channels each with knobs for gain and volume and a bright switch. Both channels share a three band EQ. The three position Cathode select switch allows you to configure the input tube bass response to match the original circuit of the selected module. This will affect the feel and tightness.