UAFX dual-engine powers the searing high-gain tones of one of the most ferocious multi-channel tube amps ever made
Authentic “end-to-end” emulation delivers the raw sound of punk, alt rock, and metal legends — from Foo Fighters and Incubus to Metallica and Tool*
Features six mic and speaker pairings used on countless iconic records
Three-channel design gives you pristine cleans, crunchy overdrive, and aggressive distortion at the flip of a switch
Choose between EL-34 or 6L6 power tubes and switch between solid-state or tube rectifiers for ultimate feel and response
Built-in TS-style overdrive and preamp boost deliver tight, articulate tones for modern rock and metal, while the integrated noise gate keeps your signal clean at high gain
Bypass cabinet/mic emulations and use in front of your amp for added tonal flavor and distortion sounds
UAFX Control mobile app lets you tweak deep settings, customize footswitches, save noise gate and boost preferences, and explore artist presets from top metal and alt rock guitarists
Timeless UA design and craftsmanship, built to last decades
Get the Raw Sound of Punk, Alt Rock, and Metal Under Your Boots
Experience the searing high-gain tone that powered legendary alt rock and metal bands from Foo Fighters and Incubus to Metallica, Tool, and more.* Giving you six classic mic and speaker pairings, built in TS-style OD/boost, and noise gate, Knuckles '92 delivers the authentic genre-defining sound of one of the most ferocious high-gain amps ever made.
Plug into a Multi-Channel Monster
Knuckles '92 perfectly captures one of the most cherished multi-channel tube amps ever made. With channels for clean, crunch, and high-gain, you can find everything from pristine cleans and light overdrive to aggressive distortion seamlessly at the flip of a switch.
Explore a Range of Rectifier Tones
Along with the famed green, orange, and red channels giving you classic cleans to smoldering lead sounds, you can experiment with EL-34 or 6L6 power tubes and switch between solid-state or tube rectifiers for ultimate feel under your fingertips.
Play Through Perfect Preamp Boosts
Knuckles '92 is equipped with a classic TS-style overdrive — a tried and true component for tight, articulate playing — and an integrated preamp boost that’s famous for sculpted modern metal tones. And its built-in noise gate gives you clear sound even at face-melting gain levels.
Get Six Epic Mic & Speaker Pairings
With six mic and speaker pairings used on countless iconic records, Knuckles '92 captures the full essence of playing through one of the greatest aggressive guitar amps ever made.
Customize Your Sound with the UAFX Control App
Unlock deep customization with the UAFX Control mobile app. Tweak hidden controls, save boosts and noise gate settings, and even change output tubes and rectifier modes. Plus, explore artist presets crafted by the world's top metal guitarists and dual-rec specialists.
Woww !!! What a Wonderfull emulation from Dual Rec.
Punchy and sooo Fat. The app needs to be better but this box is absolutely great, Big Fat Sound. Thanks UAD team for this great job..
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Frequently Asked Questions
UAFX pedals require an isolated 9 volt DC, center negative, 2.1 x 5.5 mm barrel connector (same as standard Boss connectors) power supply that can provide the following current requirements: Full-sized UAFX pedals (with two footswitches) require 400 mA (milliamps) of current; Compact UAFX pedals (with a single footswitch) require 250 mA (milliamps) of current
Connect the pedal using a USB-C cable to your compatible computer, and run the UA Connect application to update your firmware.
Dual footswitch UAFX pedals have Bluetooth, and you can download the UAFX Control mobile app from the Apple App Store or Google Play Store, to connect to your pedals and access additional functionality.
Each UAFX pedal has unique functionality. We recommend carefully reading the accompanying manual for each pedal here.
*Use of artist names does not constitute official endorsement of UAFX Knuckles '‘92 Dual Rec Amplifier.
**Product names used herein are trademarks of their respective owners, which are in no way affiliated with Universal Audio Inc. These name(s) are used solely to identify products studied in the creation of the sound models found in Knuckles '92 Rev F Dual Rec Amplifier.