Harmonic Percolator circuit has the amazing property of generating predominantly even-order harmonics – which creates an amazingly sweet and clear distortion. You may know of this circuit from its use by Steve Albini, who owns one particular unit that apparently has magical properties no other unit seems to have. They could search for holy grails and chase rainbows, but they saw a potential beyond one person’s use of it. Oddly enough, the ‘Percolator has a reputation for creating an ugly sound, albeit a cool and ugly sound. But they found something beautiful in it. So beautiful that you could play complex jazz chords through it and every note rings sweet and clear. So, using the original circuit as the springboard, they created the Karma Suture.