The earth-shattering Ashdown Sub-Octave Plus bass effects pedal generates a note one octave below the note being played at the same volume and based on the waveform of the original signal. By blending the sub-octave note with the original signal, bass players can move from a subtle reinforcement of the sound to truckloads of bone-crushing tone. As a further Plus, distortion can be added to the sub-octave note, with the amount and tonal characteristics of the distortion both adjustable by the player.

The Sub-Octave pedal is housed in a durable metal case and features an input level control with a trademark Ashdown VU meter to allow optimum signal matching from any instrument – active or passive. The pedal also features an output level control – essential for obtaining the perfect balance between the effect and the true bypass mode.