Universal Audio UAFX Knuckles '92 Rev F Dual Rec Amplifier Effects Pedal Silver
Mesa/Boogie Dual Rectifier tones in pedal form. The Knuckles '92 delivers the crushing gain and low-end authority that defined '90s metal and alt-rock. Now with MIDI control for preset management.
Pros & Cons
Pros
- +Authentic Dual Rec high-gain character with tight low-end and cutting aggression
- +MIDI compatibility for parameter tweaks and preset switching
- +Six classic mic/speaker pairings capture iconic tones from '90s albums
- +TS-style overdrive, preamp boost, and noise gate for tone sculpting
Cons
- −Requires 400mA 9V power supply (not included) — incompatible with standard Boss pedal supplies
- −Small LED indicator easily obscured by thumb when switching
- −Steep $399 price point for a single-algorithm pedal
The Verdict
The Knuckles ’92 stands out in Universal Audio’s UAFX lineup by capturing the defining sound of ’90s metal and alt-rock — the crushing, articulate high-gain voice of the Mesa/Boogie Dual Rectifier. The tonal authenticity across those six mic/speaker pairings is remarkable for a pedal, and the addition of MIDI compatibility addresses a major complaint from earlier UAFX models, letting you manage presets and parameter tweaks via external controllers.
Performance-wise, the gain structure delivers that signature Dual Rec punch without mushiness, the low-end stays tight even at extreme settings, and the included TS-style overdrive and preamp boost give you tone-shaping flexibility within the high-gain context. The noise gate is a practical addition for palm-muted riffing. Build quality feels solid, and the form factor won’t dominate your pedalboard.
The main gotchas: it requires a 400mA 9V supply (not the standard 250mA that most pedals use), the status LED gets obscured too easily, and the $399 asking price is steep for a single-algorithm unit. This is purpose-built for players who specifically want Dual Rec authenticity — if you’re genre-agnostic, you might find better value in modelers with broader amp selections. For metal and hard rock players who’ve always wished for the real amp in pedal form, the Knuckles ’92 delivers the goods with minimal compromise. Our Legendary score reflects the tonal authenticity, though the single-algorithm limitation keeps it from being universally essential.
