Check the listing for details. Bass Preacher Compressor/Sustainer Pedal. Condition: Open box. Listed at 86.89 USD. Bass guitars possess a huge dynamic range and produce powerful low frequencies. Designed for and by bassists, this compact compressor/sustainer features fully adjustable controls that can subtly transform the dynamic qualities of a bass guitar or take them to the extreme. From transparently leveling out notes so they sit in a track to creating an intensely squashed sound, the Bass Preacher helps spread the gospel of great bass tone!Features:Compact compressor designed especially for bass guitarInput sensitivity ranges from -10 dBu to +2 dBu making it a perfect fit for both passive and active basses of varying output levelsMaximum gain reduction of 21 dB, with enough make-up gain to return your signal to full volume at maximum sustain (compression)Attack toggle switch changes the timing of.