Sonic Sweetener The vintage BOSS CE-1 Chorus Ensemble and RE-201 Space Echo are legendary for their inspiring and influential effect sounds. But they’re also loved for their variable analog preamp circuitry, which instantly infuses any guitar tone with character, body, and richness. With the BP-1W, you can now access these two classic preamp tones in a premium Waza Craft pedal, along with a natural, clear voice that functions as a standard clean boost.