Universal Audio UAFX Knuckles Preamp/Rack Amplifier

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 puts the authentic genre-defining sound of one of the most ferocious high-gain amps ever made under your boots.

Use the famed green, orange, and red channels to explore perfect cleans to bone-crushing crunch and smoldering lead sounds. Then experiment with EL-34 or 6L6 power tubes and switch between solid-state or tube rectifiers for ultimate control and feel under your fingertips.

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. 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.

Three Stock Cabinets

• UK V30: 4x12 Marshall cab with V30s
• CA V30: 4x12 Oversized cab with V30s
• White 75: 4x12 Marshall cab with Celestion 75s

Thee Bonus Cabinets (Available with UAFX Control mobile app)

• 1x12 EV12
• 4x12 Celestion 80
• 4x12 Brown