MXR M288 Bass Octave Deluxe Pedal

This analog bass pedal offers players two independent octave voices and a mid+ switch to boost your midrange frequencies, all with huge amounts of headroom.

This dual-voice bass octave pedal from MXR Bass Innovations offers the sound, functionality and tone-shaping options that you've been craving for your bass rig. Compact, lightweight and easily powered by a single 9-volt battery, the M288 Bass Octave pedal utilizes MXR's own 18-volt Constant Headroom Technology (CHT) that provides the kind of studio-performance headroom and superior tracking you've only dreamed about until now.

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 will love the two 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 comes in a durable, lightweight aluminum casting and has the same high-quality jacks and switches that have made MXR pedals the road-ready standard on pedal-boards around the world for over 30 years.


- Constant Headroom Technology (CHT) for exceptional headroom and tracking
- True Bypass
- Organic Analog Tone
- Two independent octave voices
- Mid+ Switch adds a midrange boost at user selected frequency
- Lightweight and durable aluminum housing
- Compact size that fits any pedal board

Input Impedance: 1 Mohm (Effect On)

Bypass: True Bypass

Signal to Noise: 94dBV A-weighted (Vref 1V RMS)

Output Impedance: 600 ohms

Octave Frequency Bandpass: 8Hz-46Hz, -3dB

Trigger Threshold: 70dBV @ 100Hz

Dry Output Control: -infinity/+2.5dB (MID+ out)

Dry Output Response: 20Hz to 20 kHz, +0/-1dB, -3dB @10Hz

MID+ Switch: Dry Signal Midrange Boost
- 400Hz or 850Hz, Internally Selectable
- +4dB to +14dB, Internally Adjustable

Girth Control: -infinity/+1dB @ 100Hz

Growl Control: -infinity/+6dB @ 100Hz

Power Requirement:
- Standard 9-volt battery
- 9VDC adapter with 5.5mm x 2.1mm positive barrel & negative center

Current Draw: 14mA
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 1 lbs
Shipping Dimensions: 6 x 4 x 3 in
Manufacturer Part Number (MPN): M288

For support or warranty questions, please contact the manufacturer:
Phone: 707-745-2722

Reviewers gave this product an overall rating of 5 out of 5 stars. (2 ratings)
Submitted March 16, 2010 by a customer from

"usefull effect for bass"

Overall: 5 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I will be keeping this pedal until it dies then I will buy another
does what it says.Tracks very well down to the low A,any lower and it starts to falter a bit.There are Utube videos that show what it can do.
straight forward and simple seems to be built well
Ease of Use
Not hard to figure out
seems built well
price is decent compared to others
Manufacturer Support
have not needed to contact Dunlop
The Wow Factor
its a pedal not a woman

Musical Background:

active musician

Musical Style:

blues,rock,classic rock,r&b,funk,punk,anything really
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