Roland AP-7 Jet Phaser - SN 1680 drum Input is via a single

Input is via a single quarter inch input socket on the rear and output is via dual-mono phono sockets

The isolator section comes with a frequency switch that enables DJs to switch the cut-off frequency and a boost level switch located on the rear panel

but what really floored us is the sound and how playable the Elka Drummer One is

however it's in good working order and sounding good following the service: there's not quite as much top end as on a perfect Binson

Roland AP-7 Jet Phaser - SN 1680 drum Input is via a singleRoland AP7 Jet Phaser (SN 1680) for sale freshly serviced and ready for studio or stage action. Great sounding pedal. Delivers thick fuzz and swirling phase tones, with ramping speed control between fast and slow (controlled via the right hand footswitch); just like a Leslie speaker. Classic vintage sound used by many legends including Larry Graham. Bold, characterful, and great in the studio or live.