Used Keeley Java Boost Effect Pedal

The used Keeley Java Boost is in great condition and delivers vintage-style treble boost inspired by the Rangemaster circuit. Featuring a germanium transistor, it provides warm, touch-sensitive gain with selectable tone control for Mid, Treble, or Full-range boost. Ideal for pushing tube amps into rich overdrive, it operates on 9V battery or standard adapter. A favorite among tone purists, this pedal adds clarity and sustain while preserving your guitar’s natural sound.