Circuitrix has been the go-to destination for tube amp expertise in Rhode Island since 1992. This Fiskeville-based shop specializes in building, repairing, and modifying tube amplifiers for guitarists who demand exceptional tone. With over twenty years of playing experience and more than twelve years in electronic servicing, the techs at Circuitrix have developed a reputation that extends well beyond local Rhode Island bands to national acts including Roomful of Blues, Duke Robillard, and Beaver Brown.

The shop’s approach to guitar amplifier repair and modification goes beyond standard bench work‚Äöevery design is thoroughly road-tested to ensure it performs on stage, not just in theory. Circuitrix offers custom amp modifications that often surpass what major manufacturers provide, helping players maximize their tone without sacrificing their rig’s basic character. In addition to hands-on repair work, they’ve made their expertise accessible through modification kits advertised in Guitar Player magazine, along with top-quality parts for DIY enthusiasts and guitar techs working against repair deadlines. Their signature “Little Big Box” and “Model 1 Distortion” pedals have earned wide acceptance among players of all styles.