The Electro-Harmonix Bad Stone is a six-stage phase shifter, a reissue of the iconic 1977 original, perfect for classic psychedelic and modern tones. It offers both auto mode with rate and feedback controls, and a manual shift mode for unique, parked wah-like effects. Featuring a rugged, die-cast build, true bypass switching, and a built-in AC jack, the Bad Stone is a versatile phaser suitable for various guitar styles, including those inspired by Tame Impala.
Guitarists praised the Bad Stone for its excellent phasing effects, particularly for achieving 60s psychedelic and Tame Impala-inspired sounds. They found it to be a "super phaser".