Universal Audio UAFX Knuckles '92 Rev F Dual Rec Amplifier
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Get the raw sound of punk, alt rock, and metal under your boots
Knuckles ‘92 Dual Rec Amplifier delivers the scorching high-gain sound that has powered legendary punk, hard rock and metal bands - from the Foo Fighters and Incubus to Nevermore, Dream Theater and more.
With six classic mic and speaker combinations, a built-in OD/boost in the style of a well-known green effects pedal and an integrated noise gate, the UAFX Knuckles ‘92 delivers the authentic, genre-defining sound of one of the world's wildest high-gain amps right at your feet.


Plug into the California King of High Gain
Whether you seek the gritty power chords of punk, grunge and alternative anthems by the likes of Dave Grohl and Incubus or the complex aggression of Nevermore and Dream Theater, the Universal Audio UAFX Knuckles ‘92 puts one of the most versatile multi-channel amps ever made right on your pedalboard.
Explore a Range of Rectifier Tones
Utilise the infamous green, orange and red channels of the original Rectifier amps to discover perfect, shimmering cleans through to bone-crunching crunch and blistering lead tones. Experiment with EL-34 or 6L6 power tubes and switch between solid state and tube rectifiers for ultimate control and feel over your perfect sound.


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 modernmetal tones. And with its built - in noise gate giving clear sound even at extreme gain settings, you’ll melt faces the minute you power it up.
Explore a huge amp and cabinet collection
The UAFX Knuckles ‘92 features three hand-picked microphone and speaker combinations, plus three additional cabinets, flawlessly captured with UA's exclusive Dynamic Speaker Modelling.
With the UAFX Mobile App, you can customise all the Knuckles ‘92’s key controls - from preamp settings and power amp tube bias to live and preset modes and much more. You can also discover artist presets created by the world's best guitarists and Rectifier enthusiasts.
Three standard speakers:
- UK V30: 4x12 Marshall Box with V30's
- CA V30: 4x12 Oversized Box with V30's
- White 75: 4x12 Marshall Box with Celestion 75's
Three bonus speakers from the UAFX-App
- 1x12 EV12
- 4x12 Celestion 80
- 4x12 Brown


- Battery powered: Does not run on Battery power
- Boutique Effect: yes
- Controls: Gain, Presence, Output, Bass, Mid, Treble
- Country of origin: Malaysia
- Dimensions (WxHxD): 65x92x141mm
- Effect Type: Preamp
- Housing size: Medium Size
- Includes: Power supply not included
- Mono / Stereo: Stereo In, Stereo Out
- Power Consumption: 400 mA
- Power supply: 9 Volt DC, Center negative
- Special Features: check Specifications
- Switches: Cab, ALT/Amp/Store, Channel, On/Off, Preset
- Technology: digital
- Weight: 0,567 kg
- Stereo amplifier model and speaker emulation pedal
- suitable for studio: yes
Pioneer in audio recordings for more than 50 years
Founded in 1958 by Bill Putnam Sr., Universal Audio has always been synonymous with innovative recording equipment . A favorite engineer of Frank Sinatra, Nat King Cole, Ray Charles and others, Bill was a passionate innovator who is considered the Vater of modern audio recording. Many of his legendary studio and equipment designs are still used today. B. Putnam was the inventor of the modern Sound console , des Multiband audio equalizer and he was the first engineer to artificial reverberation used in commercial recordings. Alongside his friend Les Paul, Bill was also involved in the early development of stereophonic recording.
Putnam, known as a busy entrepreneur, founded three audio product companies during his long career: Universal Audio , Studio Electronics and Urei . All three companies built equipment that was widely used upon introduction and would shape studio sound for generations. The boutique compressors LA-2A and 1176 and the 610 tube console are among these legends. With the 610 mixing console, greats like... Sinatra , the Beach Boys and Van Halen their studio albums.
Universal Audio was re-founded in 1999 by Bill's sons James Putnam and Bill Putnam Jr. A twofold approach was planned: On the one hand, the classic analogue recording devices were to be faithfully reproduced in the tradition of his father; and on the other hand, the sound and spirit of Vintage analog technology should be in the new digital recording tools are used.
Impressive effects pedals for guitarists and special guitar recording tools such as the Universal Audio OX are now also part of the range and are extremely popular with fans of outstanding sound.