Used Keeley Java Boost Effect Pedal

The Keeley Java Boost is a Germanium-powered treble booster pedal designed to deliver rich, vintage overdrive tones perfect for pushing tube amps. This used unit is in good condition and offers classic Rangemaster-style response with three EQ modes—Treble, Mid, and Full Range. Powered by a 9V battery or adapter, it features true bypass switching for pure signal flow. Ideal for blues and classic rock players seeking expressive, amp-driven breakup.