The Electro Harmonix Bass Preacher Bass Compressor Sustainer allows you to take full advantage of your bass guitars dynamic range providing you with booming low frequencies. Combining the compression and sustain and also featuring full controls you can effortlessly alter your instruments sound subtly transforming its dynamic ability or alternatively turning them up to the extreme. Altering the attack allows you to decide how quickly the effect acts. With a pedal so dynamic you will soon be preaching its praises to everyone. A confident compression The Bass Preacher pedal offers complete dynamic sensitivity and an abundance of articulation allowing you to fully utilise every range of your bass to the most of its capabilities. With the compression fully dialled up and on a fast attack each one of your booming strikes will ring with an abundance of volume to infuse your playing with a crushing level presence. When the attack is slow your sound will be slightly raised for a milder albeit a more dynamically sensitive sound that rumbles with a slight inflection. Superb sustain The Bass Preacher acts simultaneously as a sustain pedal providing each pluck with enough resonance to ring through the mix. The length of the sustain can easily be adjusted allowing you to either have the notes ring for just a little bit longer or alternatively dial them up to keep them rocking the full track through. Your punchy bass will soon be sounding beautiful with extended booming bliss. Specifications Height: 2.1 (53 mm) Width: 2.75 (69 mm) Length: 4.5 (114 mm) Recommended Power Supply: EHX9.6DC-200mA or 9V Battery Signal Type: True Bypass Maximum Gain Reduction: 21 dB Input Sensitivity: -10 dBu to +2 dBu Controls: Volume Sustain Attack