The Ibanez FC10 Fat Cat Distortion is a vintage, all-analog effects pedal from the late 1980s that is widely considered to be a buffered clone of the ProCo Rat distortion circuit. It is known for its versatility, delivering a wide range of tones from smooth, bluesy grit to a saturated, almost fuzz-like roar, while effectively retaining bass and volume. Key Features and Tone

• Circuitry: The pedal features an all-analog, buffered design based on the ProCo Rat distortion circuit, but with a different op-amp (JRC5534) and a more conventional tone control.
• Versatile Sound: It offers a broad spectrum of distortion, capable of everything from a subtle overdrive to high-gain distortion and even raging fuzz when settings are cranked.
• Tone Control: Unlike the Rat's "Filter" knob, the Fat Cat's "Tone" control gets brighter as you turn it up, making it easier to dial in the desired high-end brightness and articulation.
• Clarity and Punch: A notable characteristic praised by users is its ability to maintain clarity and punch, even with high gain settings, and it does not have the "mid hump" associated with Tube Screamer pedals. It works well for both guitar and bass.
• Responsiveness: The pedal is highly responsive to the guitar's volume and tone knob adjustments, allowing players to clean up the sound for an overdrive effect without needing to switch pedals.