The MXR M288 Bass Octave Deluxe is a dual-voice octave pedal using MXR's 18-volt Constant Headroom Technology (CHT) to provide studio-performance headroom and superior tracking. Use the Dry knob to mix your direct bass signal with the octave effect, or hit the Mid+ switch to add up to +14dB of internally adjustable low-mid punch (400Hz) or midrange pop (850Hz). Bass players love the 2 separately processed and individually voiced octave controls—Growl (for throaty, midrange octave-below tone) and Girth (for deep and smooth octave below). The Bass Octave Deluxe boasts a durable, lightweight aluminum casting and has the same high-quality jacks and switches that make MXR pedals the road-ready standard on pedal-boards around the world.

The MXR CHT circuit produces 18-volts of headroom from a single 9-volt battery or external power source. CHT utilizes voltage step-up techniques, which supplies constant 18-volt headroom regardless of source voltage. For example, CHT will produce 18-volt headroom from a used battery down to 4.5-volts and voltages up to 30-volts. CHT also protects against incorrect reverse polarity and AC voltages.

Bass players world-wide rely on MXR pedals to overdrive, funkify, EQ, and compress their bass sound. MXR's commitment to bass players has been solidified by the development of the MXR Bass Innovations division—devoted to developing cutting-edge tools for bassists on stage and in the studio. MXR Bass Innovations products are found on the pedalboards of artists like as Robert Trujillo (Metallica), Leland Sklar (L.A. Studio Veteran), Juan Alderete (Mars Volta), Michael Rhodes (Nashville Studio Ace), and Marcus Miller.