MXR M288 Bass Octave Deluxe Pedal with 9V Power Supply and a Pair of Patch Cables The Bass Octave Deluxe offers two independent analog sub-octave voices with a Dry control and a Mid+ switch to optimize the sound of your parallel clean signal. The Bass Octave Deluxe is a dual-voice octave pedal that offers analog tone, true bypass, and a variety of tonal options MXR's 18 volt Constant Headroom Technology provides high headroom and superior tracking Use the Dry knob to mix in your direct signal, and hit the Mid+ switch to add up to +14dB of internally adjustable mid frequencies (400Hz or 850Hz) Finally, mix in two separately controlled octave voices-Growl (for throaty tone) and Girth (for deep tone). guitar pedal bass guitar pedal pedal for guitars guitar pedals dunlop pedals dunlop guitar pedal