Used Keeley Dark Side Effect Processor

Explore legendary fuzz, modulation, and delay tones with this used Keeley Dark Side Effect Processor in excellent condition. Inspired by classic “dark” era sounds, it pairs a powerful fuzz section with switchable modulation and spacious delay, delivering everything from gritty leads to swirling ambient textures. Simple controls make dialing in presets fast, while true-bypass switching keeps your core tone intact. Built in a rugged compact enclosure and powered by standard 9V DC for easy pedalboard integration.