Comprised of the original OD-1 Overdrive, PH-1 Phaser, and coveted SP-1 Spectrum EQ used by the likes of Prince, the Boss BOX-40 40th Anniversary Box Set commemorates a landmark release in the effects world. Carefully reconstructed by hand in the same techniques used when the pedals debuted in 1977, this trio calls back to a watershed pedal moment when the first compact units were introduced to the market and changed the scope of effects forever. A crown jewel for any Boss fan.