Developed with famous upright bass player Didi Beck and is the most versatile pickup system for Rockabilly and Psychobilly bass players. It comes with two pickups: SH951 bridge pickup and SH2500E Transducer which installs underneath the fingerboard to pickup the slap tone. The preamp and its unique sound controls allow you to realize your sound. With the pre-shapes and filters you will be able to adjust your individual Rockabilly or Psychobilly sound. Phase invert and subsonic switch will help you to avoid feedback. Whenever you need it, the built-in automatic, chromatic tuner is always ready. It responds quickly and precisely and its bright LED is easy to read. BRIDGE CHANNEL: Gain, Bass, Mid, Presence, Volume, Subsonic Filter, Pre-Shape. FINGERBOARD CHANNEL: Gain, Lo-Cut, Treble, Volume, 4kHz/8kHz switchable roll-off frequency. OPTIONS: Connect to a mono or a 2 channel amplifier, Phase switch, Chromatic automatic tuner.