
Anthony Easton
The Fat Rat by ProCo is a versatile distortion pedal with a range of features and technical specifications. Here are the details:
- Clipping Section: The pedal features a switchable clipping section, allowing users to choose between silicon clipping, as in the classic RAT, and a MOSFET/germanium clipping section. The MOSFET clipping section provides subtle scoop and smoothing in the upper mids throughout the entire gain range, resulting in a more amp-like and natural sound.
- Socketed Opamp: The pedal is equipped with a socketed opamp, allowing for easy replacement of the stock chip (OP07DP) with other compatible chips, such as the LM308, without the need for soldering.
- Large, CTS Pots: The Fat Rat is designed with large, CTS pots that provide a smooth, even sweep throughout the range of the Distortion, Filter, and Volume controls, enabling easy access to various tonal sweet spots.
- Fat Switch: This feature provides a significant bass boost and simultaneous high cut, making the pedal suitable for bass guitar, lower tunings, and enhancing low gain settings for overdrive use.
- 9 – 18V Operation: The pedal supports increased headroom and fidelity with 18V operation, resulting in less "sagging" compared to older RAT models.
- Additional Features: The pedal also includes a 100% analog signal path, a virtually indestructible steel enclosure, heavy-duty industrial footswitches, knobs, and jacks, an on/off LED indicator, a military-spec glass-epoxy circuit board, and a "no tools required" battery compartment (battery not included). It also comes with a five-year limited warranty and features a 2.1mm standard barrel jack for 9V or 18V operation.
The Fat Rat by ProCo offers musicians and audio enthusiasts a wide range of tonal possibilities and is suitable for various musical applications, including guitar and bass performances.
Watch the latest video demos and reviews for the Fat Rat from YouTube. Stompbx updates this every six months to reflect the most popular reviewers and guitar pedal demos for each pedal.

Below are live Reverb listings for the ProCo Fat Rat from Reverb. Stompbx automatically aggregates current offers to give you a quick look at available models, conditions, and prices. Perfect for comparing options and making an informed purchase.

Brand New
$265.04

Brand New
$179.99

Brand New
$179.99

Excellent
$130

Browse through eBay listings for the Fat Rat compiled in real-time. From vintage finds to brand-new units, see a variety of purchasing options. This automated collection helps you explore deals and find the right pedal at the right price.

New
$9.99

New
$179.99

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Check out the latest news and articles from around the pedal world.

Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton
Anthony Easton