The MXR M288 Bass Octave Deluxe is a highly popular, dual-voice analog sub-octave pedal designed specifically for bass guitars. It is widely praised for its organic analog warmth, flexible tone-shaping capabilities, and studio-grade tracking performance.

• Dry Knob: Controls the volume of your unaffected, clean bass signal. This keeps your core tone articulate so it does not get lost in the sub-frequencies.
• Growl Knob: Adjusts the volume of a mid-range, throaty, and aggressive sub-octave voice. It provides a raspy, vintage character similar to a classic Boss OC-2.
• Girth Knob: Adjusts the volume of a deep, smooth, and massive sub-octave voice. It offers pure low-end weight with a cleaner, mid-scooped response.
• Mid+ Switch: A push-button switch that injects up to +14dB or +15dB of midrange boost directly to your dry signal. This helps your bass cut through dense live band mixes. An internal trimpot allows you to select either a low-mid punch at 400 Hz or a midrange pop at 850 Hz.