Although it is housed in the same indestructible and road-worthy steel enclosure that's come to be a trademark of ProCo stompboxes, the Solo distortion guitar effects pedal marks a departure from the RAT series of pedals in more ways than just its cosmetics. With its enormous range of tones, 3-way selectable clipping modes (Hot, Melt, Burn), and highly interactive Scoop and Tone controls, the Solo just might be the most versatile pedal in your arsenal.

The ProCo Solo distortion pedal is equally at ease in both lead and rhythm capacities, and with a wide variety of amplifiers and guitars. Capable of going from vibey, chewy, warm low-gain tones to deliciously mean and crushing high-gain tones, the ProCo Solo pedal still remains remarkably true to the sound that matters most: the sound of you and your guitar. And speaking of staying true to the sound of your guitar, true-bypass switching ensures that when the guitar pedal is off, there is no coloration of your sound.

Even in its highest gain settings, the Solo remains extremely tube-like, articulate and touch sensitive. Complex chords ring out with clarity, leads sustain with ease. Roll back your volume knob and it cleans up, just like a good tube amp would.

The Solo effects pedal uses three pairs of carefully matched (or should we say, carefully mismatched) clipping diodes to produce asymmetrical clipping. The three pairs are accessible via the Hot/Melt/Burn slider switch. This has the effect of making the Solo clip very much like a tube amp going into natural power tube distortion.

ProCo Sound has been building professional effects since 1979. Since then, the RAT has evolved from a single, hand-built prototype into a family of versatile distortion pedals.