mxr M-188 bass auto Q User Manual

Congratulations on the purchase of your new M-188 MXR Bass
Auto Q stomp box! MXR effects have been favored by profes-
sional guitarists for decades. While other effects have come
and gone, MXR’s keep getting the job done … with bulletproof
construction, quiet, reliable switching and tasteful, musically
inspired tone shaping.
DESCRIPTION
• Authentic Crybaby
®
Bass Wah tones and Q control
• Sensitivity circuit delivers effects at any volume
• Blendable LFO shimmer goes from tremble to shriek
• Fully adjustable transition from wah to LFO
• Indestructible, die-cast zinc housing
POWER
The MXR M-188 Bass Auto Q uses one 9-volt battery. The battery access is
through the bottom of the pedal. The Bass Auto Q uses the Dunlop ECB03
Adapter (ECB03E for Europe), a 9-volt DC regulated AC adapter. Plug polarity
is positive on the barrel and negative in the center. Note: Battery must be
installed to operate the Bass Auto Q unless an AC adapter is used.
M-188 bassautoQ

mxr M-188 bass auto Q Specifications

General

Brand	mxr
Model	M-188 bass auto Q
Category	Music Pedal
Language	English

Summary

Product Description and Power

Product Description

Highlights authentic Bass Wah tones, Q control, sensitivity circuit, blendable LFO, adjustable transition, and die-cast housing.

Power Requirements

Details the use of a 9-volt battery or Dunlop ECB03 AC adapter, including polarity and note on battery operation.

Controls Overview

Footswitch

Toggles Effect On/Bypass; red LED indicates when the effect is on.

Range Knob

Controls the frequency floor of the effect.

Q Knob

Adjusts the intensity of the wah effect.

Volume Knob

Controls overall effect volume, inactive in Bypass mode.

Decay Knob

Controls the dropoff decay of the wah effect.

Blend Knob

Controls the mix between wah and shimmer effects.

Rate Knob

Controls the speed of the shimmer effect.

Operating Instructions

Initial Setup

Guide for connecting instrument/amplifier, setting bypass mode, initial knob positions, and volume balancing.

Wah Effect Adjustment

Details on adjusting Range, Q, Volume, and Decay knobs for the wah effect's characteristics.

Shimmer Effect Control

Explains how to use Rate and Blend knobs for the variable shimmer, and Decay for wah-to-shimmer transition.

Sample Settings

Artist Presets

Provides knob and switch settings used by artists like Justin Meldal-Johnsen, Chris Chaney, Lee Skylar, and Mark Browne.