Tama HPDS1TW Dyna Sync Double Pedal bass phaser two channel microphone preamp designed BLX4 J11 two channel microphone preamp designed for use with both large diaphragm and standard studio mics Four “stompbox” effects (Compressor The conventional approach to the spring assembly (including previous Iron Cobra Pedals) has been to anchor the bottom of the spring while the top of the spring is being pulled from various angles throughout the pedal's cycle The Sync Coil assists the return of the footboard to the original position to provide an extra element of quickness to the pedal and slides on the bass plate so drummers can customize their own level of pedal return assistance