BOSS ME-20B Bass Multiple Effects Pedal Board User Manual

1. Introduction

The BOSS ME-20B is a powerful multi-effects unit designed for bass players seeking a versatile and robust solution for live performance. This pedal board combines a wide array of effects with an intuitive interface and durable construction, making it suitable for various musical styles and performance environments.

This manual provides essential information for setting up, operating, and maintaining your ME-20B to ensure optimal performance and longevity.

2. Key Features

• Performance-based bass processor with BOSS tone and quality.
• Durable metal chassis with three footswitches, five real-time control knobs, and an expression pedal.
• EZ Edit function for rapid sound creation and adjustment.
• Unique effects including Synth, Octave, and Defretter.
• BASS ENHANCE function for an instant presence boost.
• Wide variety of effects: Compressor, Overdrive, Distortion, T-Wah, Phaser, Flanger, Chorus, Delay, Reverb.

3. Setup

3.1 Unpacking and Inspection

Carefully remove the ME-20B from its packaging. Inspect the unit for any signs of damage that may have occurred during shipping. Retain all packaging materials for future transport or storage.

3.2 Power Supply

The ME-20B can be powered by batteries or an optional AC adapter (PSA series, sold separately). For stable performance, especially during extended use, an AC adapter is recommended.

• Battery Installation: Open the battery compartment on the underside of the unit. Insert six AA-size batteries, ensuring correct polarity.
• AC Adapter Connection: Connect the AC adapter to the DC IN jack on the rear panel of the ME-20B. Plug the adapter into a standard AC outlet.

Note: Always disconnect the power supply when the unit is not in use to conserve battery life or prevent accidental operation.

3.3 Connecting Your Equipment

Follow these steps to connect your bass guitar and amplifier to the ME-20B:

1. Connect your bass guitar to the INPUT jack (1/4-inch audio) on the ME-20B using a standard instrument cable.
2. Connect the OUTPUT L/MONO jack (1/4-inch audio) on the ME-20B to your bass amplifier's input using another standard instrument cable. If using a stereo setup, connect the OUTPUT R jack to a second amplifier or mixer input.
3. Ensure all volume levels on your bass, ME-20B, and amplifier are set to minimum before powering on.

An image showing the BOSS ME-20B Bass Multiple Effects Pedal Board, featuring its metal chassis, three footswitches, five control knobs, and expression pedal. This provides a visual reference for connecting cables and identifying controls.

4. Operating Instructions

4.1 Powering On and Off

• To Power On: After connecting your equipment, turn on the ME-20B by pressing the POWER switch. The display will illuminate.
• To Power Off: Press the POWER switch again. Always turn off your amplifier after turning off the ME-20B.

4.2 Navigating Patches and Effects

The ME-20B operates in two main modes: Patch Mode and Manual Mode.

• Patch Mode: This mode allows you to select and use pre-programmed or user-saved patches, each containing a combination of effects and settings. Use footswitches 1, 2, and 3 to select patches within a bank. Use the BANK UP/DOWN footswitches (often combined with other footswitches) to change banks.
• Manual Mode: In this mode, you can individually turn effects on/off and adjust their parameters using the control knobs. This is ideal for real-time tweaking.

4.3 EZ Edit Function

The EZ Edit function simplifies the process of creating and modifying sounds. By pressing the EZ EDIT button, you can quickly adjust multiple parameters simultaneously using the control knobs, allowing for intuitive sound shaping without deep menu diving.

4.4 Saving Your Settings

Once you have created a sound you like, you can save it as a user patch. Refer to the detailed instructions in the full manual for the specific button combinations and steps required to save patches. This typically involves pressing a WRITE button and confirming the save location.

4.5 Expression Pedal

The built-in expression pedal can be assigned to control various effect parameters, such as volume, wah, or modulation speed. Pressing the toe-end of the pedal often activates or deactivates the assigned effect (e.g., Wah). Calibrate the expression pedal if its response feels inconsistent.

5. Effects Overview

The ME-20B offers a comprehensive suite of effects tailored for bass guitar. Here is a brief overview of some key effects:

• Compressor: Evens out dynamics, providing a more consistent and punchy bass tone.
• Overdrive/Distortion: Adds grit, warmth, or aggressive saturation to your sound.
• T-Wah: An auto-wah effect that responds to your playing dynamics.
• Phaser/Flanger/Chorus: Modulation effects that add swirling, sweeping, or thickening textures.
• Delay: Creates echoes, adding depth and space to your sound.
• Reverb: Simulates acoustic spaces, from small rooms to large halls.
• Defretter: Simulates the sound of a fretless bass.
• Synth: Transforms your bass signal into synthesizer-like tones.
• Octave: Adds notes an octave below or above your played note for a thicker sound.
• BASS ENHANCE: A dedicated function to instantly boost the presence and clarity of your bass tone.

6. Maintenance

6.1 Cleaning

Wipe the unit with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth and then dry thoroughly. Avoid abrasive cleaners, waxes, or solvents, as these can damage the finish and components.

6.2 Storage

When not in use for extended periods, remove the batteries to prevent leakage. Store the ME-20B in a cool, dry place away from direct sunlight and extreme temperatures.

7. Troubleshooting

If you encounter issues with your ME-20B, refer to the following common troubleshooting steps:

• No Sound:
  • Check all cable connections (bass to input, output to amp).
  • Ensure the ME-20B and your amplifier are powered on and their volume levels are not at minimum.
  • Verify that the correct input/output settings are selected on your amplifier.
  • If using batteries, check if they are depleted or incorrectly installed.
  • Test with a different instrument cable to rule out cable failure.
• Unexpected or No Effect Sound:
  • Ensure you are in the correct mode (Patch Mode or Manual Mode) for the desired operation.
  • Check if the specific effect you intend to use is active within the current patch or manual settings.
  • Verify that effect parameters (e.g., level, depth) are not set to zero.
• Display Not Working:
  • Ensure the unit is receiving power (check batteries or AC adapter connection).
  • If the issue persists, power cycle the unit (turn off, then on).
• Footswitch/Expression Pedal Not Responding:
  • Ensure the unit is powered on.
  • Check if the footswitch or expression pedal is assigned to a function in the current mode/patch.
  • Recalibrate the expression pedal if its response is erratic.

If these steps do not resolve the issue, please consult the BOSS support website or contact customer service for further assistance.

8. Specifications

Note: Specifications are subject to change without notice. For the most current information, please refer to the official BOSS website.

9. Warranty and Support

The BOSS ME-20B is covered by a manufacturer's warranty. Please refer to the warranty card included with your product or visit the official BOSS website for detailed warranty terms and conditions specific to your region.

For technical support, service, or inquiries, please contact BOSS customer support through their official website or the contact information provided in your product documentation. When contacting support, please have your product model number (ME-20B) and serial number ready.