Quick answer: The Knuckles '92 Rev F Dual Rec Amplifier is an authentic Universal Audio UAFX product. Priced at $399.00, sold brand-new by Victory Musical Instruments, a veteran-owned authorized UA dealer in Miami, FL. Questions? Call 844-687-4208.

Modern high-gain rectifier tone, on your pedalboard. The Universal Audio UAFX Knuckles '92 Rev F Dual Rec Amplifier delivers the seminal sound of the 1992 Mesa Dual Rectifier Rev F — the amp that defined modern metal and high-gain rock guitar from the early '90s to today.

At a Glance

Overview

The Mesa Dual Rectifier — particularly the original 1992 Rev F revision — is one of the most influential amps of the modern era. Used by everyone from Metallica and Tool to Foo Fighters and Korn, the Dual Rec defines a specific kind of saturated, percussive, tight-low-end high-gain tone that became the sound of '90s and 2000s heavy guitar. Knuckles '92 captures the Rev F specifically — the most coveted revision among collectors — with UAFX dual-engine processing and OX cabinet emulations.

Key Features

• Authentic 1992 Mesa Dual Rectifier Rev F Sound — The original "Rev F" Dual Rec is the most sought-after revision; Knuckles '92 captures it precisely.
• Multiple Channels — Clean, crunch, and high-gain channels modeled separately.
• OX Amp Top Box Cabinet/Mic/Room Emulations — Multiple Mesa-style 4x12 cabs, premium mics.
• Stereo Operation — Two-channel inputs and outputs.
• 4-Cable Mode — Insert effects between preamp and power amp sections.
• Cab Bypass — Use as a high-gain preamp in front of a real amp.

UAFX 2.0 Features

• Four On-Pedal Presets — Store and recall four complete amp settings via the footswitches; instantly switch between rhythm, lead, clean, and dirty tones.
• MIDI-over-USB — Realtime MIDI control of parameters and preset changes for programmable rigs.
• Improved Bluetooth + USB-to-Mobile — Reliable wireless or hardwired connection to the UAFX Control mobile app.
• UAFX Control App — Audition cabs, mics, rooms, presets, and artist signature sounds; archive your favorites to the cloud.

Specifications

• Power — Isolated 9V DC, center-negative, 400 mA minimum (sold separately).
• Inputs — 2 x 1/4" TS (right input for stereo connections and 4-cable mode).
• Outputs — 2 x 1/4" TS (right output for stereo connections and 4-cable mode).
• USB — USB Type-C for firmware updates and MIDI-over-USB.
• Wireless — Bluetooth for UAFX Control mobile app connection.
• Dimensions — 2.56" x 3.62" x 5.55" (65 x 92 x 141 mm).
• Weight — 1.24 lbs.

Why a Knuckles '92?

Modern high-gain guitar requires specific tonal characteristics — tight low end, articulate mid-gain, and percussive attack — that the Mesa Dual Rectifier defined. Knuckles '92 brings that sound to any pedalboard or DAW. Particularly useful for studio sessions where moving a real Mesa head and 4x12 cab isn't practical, or for direct-to-interface modern rock and metal recording.

What's in the Box

• UAFX Knuckles '92 Rev F Dual Rec Amplifier pedal
• Quick start guide
• Note: 9V isolated power supply (minimum 400 mA) sold separately

Frequently Asked Questions

What power supply does this UAFX pedal need?

It runs on a standard 9V DC center-negative power supply (larger UAFX models need a higher-current supply). Check the box contents listed above to see whether a power supply is included with this model.

Is it true bypass, and does it work in stereo?

UAFX pedals offer switchable true or buffered bypass via the free UAFX Control app, and stereo-capable models accept and output stereo through their TRS or dual jacks.

Do I need the UAFX Control app to use it?

No, the pedal works standalone right out of the box. The free UAFX Control app (mobile and desktop) is optional and unlocks extra presets, alternate models, and deeper settings.

What's included in the box?

Your purchase includes: UAFX Knuckles '92 Rev F Dual Rec Amplifier pedal, Quick start guide.

Is the Knuckles '92 Rev F Dual Rec Amplifier a genuine Universal Audio product?

Yes. Victory Musical Instruments is a veteran-owned, authorized Universal Audio dealer based in Miami, FL. Every unit is brand-new, factory-sealed, and covered by the full UA manufacturer warranty.

Can I get help choosing or setting it up?

Absolutely. You'll talk to real people, not a call center. Call us at 844-687-4208 and we'll help you spec the right gear and get it running.

Why Buy from Victory Musical Instruments

Victory Musical Instruments is a veteran-owned authorized UA dealer based in Miami, FL. We back every sale with real human support, fast shipping, and the kind of follow-through that only comes from a small dedicated team. Active duty, veterans, reservists, and eligible family save through our ID.me military discount program.