Plug into a Multi-Channel Monster

Universal Audio UAFX Knuckles ’92 Dual Rec Amplifier 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

Universal Audio UAFX Knuckles ’92 Dual Rec Amplifier 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, Universal Audio UAFX Knuckles ’92 Dual Rec Amplifier 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.