Proco FATRAT DISTORTION PEDAL

An Overpowered RAT: The FATRAT in the Lineage of Iconic Distortions

The FATRAT is the latest member of the RAT family: you immediately recognize that abrasive, precise, and distinctive grain, but with options designed for today's needs. Built around the "Whiteface '85" spirit, it adds enhanced bass, a switchable clipping section, and several optimizations that expand the palette without betraying the original personality. The result: a distortion that remains biting in the mix while offering more "musical" settings for low tunings and modern pedalboards.

Who It's For, Which Styles, and In What Contexts?

The Pro Co FATRAT is aimed at guitarists (and bassists) looking for a versatile distortion : from a snappy crunch to a dense saturation close to fuzz, with excellent ability to cut through a band mix. It shines in rock, punk, alternative, indie, stoner, and all aesthetics that require character without losing definition.

On stage, its robust format and true bypass make it a reliable choice for a pedalboard. In the studio, the 18V power supply and clipping selection allow fine-tuning the texture: tighter and more aggressive in silicon mode, softer and more "amp-like" in MOSFET/germanium mode. If you play in detuning or on bass, the Thick switch helps maintain the low-end foundation without sounding too "cold" or too bright.

Controls, Switches, and Design: Easy to Adjust, Hard to Fault

The FATRAT gets straight to the point with the three iconic controls: Distortion (gain level), Filter (typical RAT treble cut filter, very effective at taming harshness), and Volume (output level). Added to this are two essential switches: the clipping selector (silicon or MOSFET/germanium) and the Thick selector to radically thicken the low end.

Another strong point: the OP07DP op-amp is socketed, so easily replaceable without soldering for modders and fine-tuning enthusiasts. Like all RATs, it is true bypass and made in the USA, with a "stage tool" approach: footswitch, jack sockets, and build quality designed to last.

The Sound

The FATRAT's sonic signature is that RAT grain : an incisive, slightly rough drive with natural compression that provides sustain and a very present attack. In silicon mode, you get a clear, cutting distortion, perfect for punchy rhythms and standout leads. In MOSFET/germanium mode, the pedal introduces a slight scoop and softening of the upper mids across the gain range: the sound becomes more "organic," closer to a saturated amp channel.

The Thick switch turns the pedal into a big-sound machine: more bass, less treble, and a more "massive" feel that works very well in low tunings, on baritone guitars, or bass to retain body. As for references, the FATRAT is notably found in rigs of musicians like Graham Coxon, Joe Trohman, Eyedress, Luke Bentham, Accorinrin, and Coastlands, proving its place in worlds ranging from punchy rock to modern alternative.

• 5-year warranty

Technical specifications

Effects	Distortion	Type	sector
Technology	Analog	Use	electric guitar
Format	Pedal	Color	Black
EQ	Filter

Circuit inspiration	" Whiteface '85 "	Output	6.35mm jack
Switchable clipping section	silicon or MOSFET/germanium	Faceplate	angled
Thick switch	bass boost with treble attenuation	Illumination	yes
Op-amp	OP07DP in a socket, replaceable without soldering	Electronic circuit material	military-grade glass epoxy
Potentiometers	Distortion, Filter, Volume	Battery	sold separately
Switches	Thick, Clipping	Country of manufacture	USA
Footswitch	on/off	Included accessories	documentation
Status indicator	LED	Power supply	9V to 18V DC
Bypass	true bypass	Current consumption	approximately 5 mA
Input	6.35mm jack