

The sound clips are divided into 8 sections and takes a methodical approach, going through all of the dimensions of the Bass Octave Deluxe one by one. By default the M288 is set to boost at 400 Hz and the screw is in the center position, which I guess will translate into 9 dB attenuation of the midrange if the boost is linear. The dipswitch allows you to select either a 400 Hz or 850 Hz midrange boost, and the screw will define the amount of boost from +4 dB to +14 dB. As mentioned in the opening of this section, you will find a 2-way dipswitch and a tiny screw inside the pedal. Kicking in this switch in will boost the 400 Hz frequency area.

You can use the GROWL and GIRTH knobs individually or mix them to shape the color of your tone as you see fit.Īs if that wasn’t enough, MXR also added a MID+ button that will boost the mid frequencies for even more cut-through-the-mix power. The GROWL knob controls the level of an octave below with a punchy, mid-focused character, while the GIRTH knob controls the level of another additional note (also one octave below) with a much softer almost sub-like character. The first knob, DRY, controls the level of your clean signal. Under the hood, though, you will also find a 2-way dipswitch and a tiny screw that you can adjust – more on that in a bit. The MXR Bass Octave Deluxe has three rotating knobs, one push button, two blue LEDs and the obligatory footswitch on the surface.
