Pearl P932 Chain Drive Double Bass Pedal. Featuring the industry leading characteristics of the award-winning Demon Drive pedals, the Pearl Demonator Double Pedal is a wonderful addition to the Demon Drive family. The Demonator is a single-chain drive pedal, equipped with a Demon Style Powershifter long-footboard. A patented interchangeable cam and infinitely adjustable beater angle allow you to customize the pedal to your preferred feel and power. Demon Style PowerShifter Function Longboard. Dual Surface Beater w/ Core Control. Perfect Circle cam w/removable Eliminator Eccentic cam. For Instrument (X) : Drum Set.