The Electro-Harmonix Stereo Polyphase offers up mile-wide stereo imaging and a mountain of control. This versatile envelope/LFO phase shifter features user-determined start and stop points, huge dynamic range, and an input stage that's ready for even the hottest guitars and synths. Bring your favorite expression pedal to this phasing party and gain even more control, perfect for cascading phaser sounds across two amps.