Synergy Soldano SLOII Preamp Module with 20IR Amplifier Head
The Soldano SLO-100 Super Lead Overdrive boasts searing harmonics with tons sustain & a tight touch response. Featuring all-tube preamp, 2 independent channels, & plenty of gain/EQ tone shaping. The SYNERGY SYN-20IR is an All-Tube, IR Equipped, 20w amp with a 3-Channel Preamp Module Platform.
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The Soldano SLO-100 didn't just raise the bar for high-gain amplification — it picked it up, cranked it to eleven, and left every other amp in 1987 questioning its life choices. Mike Soldano's legendary circuit has earned the trust of players like Mick Mars and Eric Clapton, and now that same iconic tone lives inside the Synergy SLO II preamp module. Paired with the SYN-20IR all-tube modular head, you get the sound of a cranked SLO-100 in a perfect package.
Two Channels, One Amp
Most guitarists spend years chasing their perfect tone. The SLO II hands it to you in two fully independent channels that cover everything from sparkling clean to face-melting overdrive. Each channel operates on its own terms, letting you dial in two completely different voices and switch between them without any tonal identity crisis.
All-Tube 20-Watt Power Stage: The SYN-20IR runs the SLO II module through a real tube power amp, preserving the dynamic response and feel that only tubes can provide at stage-worthy volume.
Two Fully Independent Channels: Each channel has its own dedicated Gain, Bass, Middle, and Treble controls.
Crunch / Overdrive Switch Per Channel: Faithfully following the original SLO-100 design, you can choose Crunch or Overdrive on each channel independently — two Crunch channels, two Overdrive channels, or one of each. The flexibility is yours.
Normal / Tight Switch Per Channel: Normal mode delivers that iconic, throaty Soldano voice. Tight mode keeps your attack percussive and focused as gain increases, making it ideal for players who need definition without mushiness.
All-Tube Tone
There’s no modeling here. No digital wizardry pretending to be a tube amp over a polite handshake. The SLO II is an all-tube preamp module powered by two 12AX7s, designed by Mike Soldano himself to replicate the exact circuit behavior of the original SLO-100. The result is rich harmonic complexity, thick saturation, and that famously elastic sustain — straight from the source.
2 x 12AX7 Preamp Tubes: These aren't just decorative glowing cylinders. They're doing real work, generating the thick harmonics, creamy gain, and endless sustain that made the SLO-100 a legend in the first place.
Authentic Soldano Circuit Design: Mike Soldano personally designed this module to match his original amp's response, touch sensitivity, and voice. It's not an emulation — it's the real deal in preamp form.
Onboard IR Loader: Cabinet simulation is built right in, allowing direct recording or silent stage use without an external load box or IR player. Studio-quality tones without hauling a 4x12 into the control room.
Cathode Select Switch: A three-position PCB switch lets you configure the input tube bass response to match the original SLO-100 circuit (position 3). You can also experiment with positions 1 and 2 to adjust feel and tightness to taste.
Version II: Smarter, More Versatile, Still Undeniably SLO
The original SLO module became the most sought-after preamp in the entire Synergy lineup — and then the SLO II showed up and made it look like a rough draft. Three targeted upgrades give players more control without touching what made the original so special. The heart and soul — touch response, thick voice, famous sustain — remain completely intact.
Independent Three-Band EQ Per Channel: The SLO II gives each channel its own dedicated Bass, Middle, and Treble stack. Dial in your rhythm tone without disturbing your lead sound, or vice versa.
Expanded Gain Stage Options: With Crunch and Overdrive available on each channel independently, you now have four distinct gain configurations at your fingertips — a significant upgrade from the original's single-shared gain voicing.
MIDI Switching & Modular Compatibility: Full MIDI control makes integrating the SYN-20IR into any modern rig a breeze. The Synergy dock also accepts any Synergy preamp module, so your head grows right alongside your tone obsession.
More Than the Sum of Its Tubes
The Synergy Soldano SLO II module paired with the SYN-20IR head is one of the most complete high-gain rigs available at any price. You get Mike Soldano's original circuit DNA, two independently voiced channels with more switching options than most guitarists know what to do with, a real tube power stage, built-in IR loading, and MIDI control — all in a package that's easy to transport, quick to install, and genuinely fun to play.
Whether you're chasing the searing harmonics that defined Mick Mars's crunch or the bluesy warmth that Eric Clapton found in his SLO-100, this combination gets you there.
Synergy Soldano SLO II Preamp Features:
All-tube preamp module based on the SLO-100
Two identical and fully independent channels
Gain, Bass, Middle and Treble per channel
Crunch / Overdrive switch per channel
Normal / Tight switch per channel
2 x 12AX7 preamp tubes ensure rich harmonic performance
Easy to install and remove from Synergy preamp docks
Synergy Soldano SLOII Preamp Module with 20IR Amplifier Head
Item #:
SYN SOLSLOII20IR
Manufacturer Part Number:
SYN SOLSLOII20IR
UPC:
763815134093
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craig d. 🇺🇸
Verified Buyer
Great idea, but the cab
Great idea, but the cab sims have a low mid room honk built in that I didn’t care for. Better ir’s would help improve the sound.
Published date
05/10/26
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Frequently Asked Questions
The SLO II is an all-tube preamp module for the Synergy modular amp system, designed by Mike Soldano himself to replicate the circuit of his iconic SLO-100 amplifier. It features two independent channels, each with its own EQ, Crunch/Overdrive switch, and Normal/Tight switch for expanded tonal flexibility.
The SLO II adds three key upgrades over the original: independent three-band EQs on both channels, a Crunch/Overdrive select switch per channel, and a Normal/Tight switch per channel. Everything that made the original great, including touch response, thick voice, and sustain, remains unchanged.
Yes. The SYN-20IR is fully compatible with the entire Synergy preamp module library, which includes modules based on Marshall, Fender, Mesa/Boogie, Friedman, and many other iconic amplifiers. It’s one of the most flexible modular amp platforms available.
Absolutely. The SYN-20IR includes a built-in IR loader that allows you to record directly to your interface or run silent on stage without needing an external load box or cabinet. It’s a genuinely studio-ready solution out of the box.
Very much so. The original SLO-100 was famously used by Mark Knopfler, Eric Clapton, Gary Moore, and Warren Haynes, none of whom are known for playing metal. The SLO II's clean channel and crunch mode are expressive and dynamic enough for blues, classic rock, and country applications.
Questions & Answers
1 answered questions
Jacob
Verified User
Q: Does this include the footswitch as well?
Answers on Content by By AMS Customer Service on Mon Mar 09 2026
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