ProCo Sterling Vermin Rat Distortion Pedal

The Sterling Vermin was born from a desire for something different — something refined, with the soul of a traditional RAT pedal, but with a voice all its own.

Built in small batches and hand-soldered in their Jackson, Missouri headquarters, the ProCo Sterling Vermin is a work of pure beauty that honors the brand legacy while taking a bold step forward for creativity.

The Sterling Vermin features the LM741 Op-Amp and a pair of selectable clipping diodes. Players can toggle between the traditional RAT silicon diode configuration for a punchy, mid-range bite, or the BAT41 option for a smoother, more balanced response. The result is a pedal that’s equally at home delivering snarling distortion or articulate, low-gain overdrive, with a wide, usable tonal range throughout the entire gain spectrum.

The pedal also features CTS pots and oversized knobs for even, responsive control that affords a satisfying smoothness to the rotation, with just the right amount of tension. Additionally, the polished stainless-steel enclosure with laser-annealed graphics showcases the merging of the pedal’s vintage flavor and striking design.

From low-gain tones reminiscent of a Klon or Bluesbreaker, to high-gain settings that flirt with Big Muff territory — yet stay tight and controlled — the Sterling Vermin is a masterclass in dynamic distortion. With premium components, deliberate design and a focus on feel, the Sterling Vermin is more than a pedal, it’s a new chapter for RAT.

Features:

• Polished Stainless Steel
• Switchable diodes SI/BAT41
• LM741 Op-Amp
• CTS Pots and oversized knobs
• Assembled in Jackson MO
• Infinitely versatile