Get FREE shipping on all orders!
Fast FREE shipping on all orders!
The Synergy RD Module is a dual-channel tube preamp with 2 identical, independent channels. Featuring remarkable flexibility, 2 selectable voicings, 3-position bright switch, & rich harmonics
h m s
Compare! Here are all the serial numbers of this model we have in stock. Compare them all and select your favorite!
Did you know AMS is the only music distributor with four distribution centers? And that means we can offer super-fast shipping on all your music products. Whether you don’t want the spark of inspiration to fade or you really need that replacement speaker before the next show, we have you covered anywhere in the U.S. And even better, it’s FREE!
If defective, this item must be exchanged directly through the manufacturer. It can only be returned to us if it is unopened.
Don’t sell your soul to a creditor to get the gear you need. At AMS, we want to lower the barriers to create. That’s why we offer in-house 0% financing, and you don’t even have to open a new line of credit! Spread out payments on your credit card to simplify financing and avoid hefty late fees or service charges. Cost shouldn’t interfere with your creativity.
You shouldn’t have to pay extra for a little peace of mind. When you purchase from AMS, you’ll get a free 12-month extended warranty to cover your purchase — and that’s in addition to any manufacturer’s warranties! Thousands of items in our catalog feature the “Gold Lock Extended Warranty,” so you can feel confident in your purchase.
Sometimes the gear on the computer screen seems like a better fit than when you actually get your hands on it. We understand, and that’s why AMS offers an industry-leading 45-day money-back guarantee. If you’re not happy with an item, you have a full month and a half to send it back! We don’t want to just sell you gear. We want to sell you the RIGHT gear — even if it takes a few tries.
Some amps are recognized as much by their color as their circuit, and the RD bottles two of the most iconic shades of British gain ever committed to a chassis. Built for Synergy's all-tube modular preamp system, the RD packs two fully independent channels into one module, each capable of switching between two distinct personalities at the flip of a switch. Whether you're chasing tight rock crunch or thick, saturated modern gain, the RD delivers the grind, punch, and harmonic complexity that have made these circuits a mainstay on stages and in studios everywhere.
In ROCK mode, the RD channels the sound of a modern British rock amp at its most articulate, tight, aggressive, and unmistakably punchy in the midrange. Flip to DARK mode and the gain structure thickens considerably, trading articulation for a heavier, more compressed feel built for crushing rhythm tones and sustaining leads.
A three-position Bright switch sits on each channel, giving you direct control over how much high-frequency snap makes it into your signal. Combined with independent Gain, Bass, Middle, Treble, and Volume knobs on both channels, the RD hands you the kind of granular control that usually takes two separate amp heads to achieve.
The RD's three-position Cathode Select switch changes how much low end reaches the gain stages before the tone even hits your EQ. Each position reshapes the resistor and capacitor values on the input tube's cathode circuit, giving you a different foundation to build your tone on.
The Synergy RD gives you two genuinely independent channels, each with its own voicing, EQ, and gain structure, all packed into a single module built for Synergy's preamp ecosystem. It's a serious amount of British gain flexibility for players who don't want to compromise between rhythm and lead tone, vintage grind and modern saturation, or one amp and two.
