The Accutronics 4AB3C1B Reverb Tank is a high-quality 17-inch long spring reverb unit, widely recognised as a standard replacement for many Fender tube amplifiers and boutique amp designs. Built to original specifications, it provides a warm, deep, and natural-sounding reverb that has defined the tone of countless classic recordings.

Constructed with premium springs and components, the 4AB3C1B delivers consistent performance, low noise, and smooth decay — perfect for restoring or upgrading your amplifier’s reverb system.

Accutronics has been the industry leader in spring reverb technology since the 1960s. The 4AB3C1B continues this legacy, delivering the authentic Fender-style reverb that players and amp builders trust for professional tone and reliability.