Designed to deliver rich boutique overdrive and expansive tonal versatility, the Synergy RD Preamp Module packs two identical, fully customizable channels into a patented swappable unit. Driven by two 12AX7 preamp tubes, each channel features independent Gain, Volume, Bass, Middle, and Treble controls alongside selectable Rock and Dark voicings for tailored gain response. A three-position Bright switch and a three-position Cathode Select switch allow players to fine-tune high-frequency sheen and input tube response to match any guitar or setup. Fully compatible with all Synergy preamp docks and SYN series modular amplifiers, this dual-channel module effortlessly transitions between articulate rhythm crunch and searing, singing lead tones.

British flavored preamp module

Two distinct shades of British gain. Two identical, fully independent channels. One remarkably flexible all-tube module.

Some amplifier designs are recognized as much by their sound as by their unmistakable color. The Synergy RD module captures two of the most revered British high-gain voices ever created, delivering everything from muscular rock crunch to thick, saturated modern gain.

Designed for Synergy’s all-tube modular preamp system, the RD features two identical channels, each capable of delivering two distinct British gain personalities. Whether you’re chasing articulate hard rock rhythm tones, crushing modern metal, or soaring lead sounds, the RD delivers the signature grind, punch, and harmonic richness that have made these circuits favorites on stages and in studios around the world.

Like every Synergy module, the RD is engineered to capture not only the tone, but the feel, touch sensitivity and responsiveness that inspire players every time they plug in.

Two identical channels

Two selectable voicings per channel: ROCK and DARK

Three-position Bright switch on each channel

Three-position Cathode Select switch for input tube response

Independent Gain, Bass, Middle, Treble,and Volume controls for each channel

Configure each channel independently for rhythm and lead sounds

2 x 12AX7 preamp tubes ensure rich harmonic performance

Compatible with all Synergy preamp docks, SYN Series amplifiers and modular preamp systems

Synergy hardware and interchangeable preamps are protected under US patent.

Free 3-Year Warranty

Sound Pure stands behind our products. Free three-year warranty on this item. Coverage exclusions live in Terms & Conditions, Section 27.

Level of support and expertise that simply isn't available at big-box megastores. Read the warranty →

Returns

Try Before You Buy: take it home, commit only when it's right. Program details →