Used Keeley BUBBLE TRON Effect Pedal

Unlock classic envelope-filter funk and synthy sweeps with this used Keeley Bubble Tron in great condition. It delivers three inspiring modes—Envelope Filter, Flanger, and Phaser—with intuitive controls for Sensitivity, Rate, Depth, and Filter to dial in everything from quacky auto-wah to lush modulation. Built in a compact, road-ready enclosure, it runs on standard 9V DC power and features true-bypass switching for a clean, unaffected signal when disengaged.