Jim Dunlop M108S
MXR Ten Band EQ Guitar Effects Pedal User Manual
Model: M108S | Brand: Jim Dunlop
Introduction
The MXR Ten Band EQ is a versatile guitar effects pedal designed to provide precise tonal control for your instrument. It features ten carefully selected frequency bands, along with input and output level controls, allowing musicians to sculpt their sound, enhance specific frequencies, or compensate for acoustic environments. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your MXR Ten Band EQ pedal.
Key features include noise-reduction circuitry, true bypass switching for signal integrity, a lightweight aluminum housing for durability, brighter LEDs for improved visibility on stage, and a second output for running dual signal chains.
Product Overview

Figure 1: Top view of the MXR Ten Band EQ pedal, highlighting the ten frequency sliders, volume, gain controls, and the footswitch.

Figure 2: Bottom view of the pedal, illustrating the input, dual output (OUT 1, OUT 2), and power connection points.

Figure 3: Left side profile of the MXR Ten Band EQ pedal.

Figure 4: Right side profile of the MXR Ten Band EQ pedal.
Setup
Follow these steps to properly set up your MXR Ten Band EQ pedal:
- Power Connection: Connect an 18-volt DC power supply (not included) to the POWER jack on the pedal. Ensure the power supply meets the specified voltage and current requirements to prevent damage.
- Input Connection: Connect your instrument (guitar, bass, etc.) to the IN jack using a standard 1/4-inch instrument cable.
- Output Connection: Connect the OUT 1 jack to your amplifier or the next pedal in your signal chain. The pedal also features a second output, OUT 2, allowing for dual signal chain setups (e.g., wet/dry rig, sending signal to two amplifiers).
- Placement: Position the pedal on a stable surface or integrate it into your pedalboard.
For optimal performance, ensure all connections are secure before powering on your amplifier or other audio equipment.
Operating Instructions
The MXR Ten Band EQ provides comprehensive control over your audio frequencies. Familiarize yourself with the following controls:
- Frequency Sliders (31.25Hz to 16kHz): These ten sliders allow you to cut or boost specific frequency bands by up to ±12dB. Adjusting these sliders enables precise tone shaping, from subtle enhancements to dramatic sonic alterations.
- VOL (Volume) Slider: Controls the overall output volume of the pedal. Use this to match levels with other effects or to provide a volume boost.
- GAIN Slider: Adjusts the input gain of the pedal. This can be used to boost your signal before equalization, or to drive your amplifier harder for increased saturation.
- Footswitch: Engages or bypasses the equalization effect. The pedal features true bypass switching, ensuring your instrument's signal remains unaffected when the pedal is disengaged.
- LED Indicators: Each slider is equipped with an LED that illuminates to indicate its position, providing high visibility even in low-light conditions on stage.
Experiment with different slider configurations to achieve desired tonal characteristics. For example, boosting mid-range frequencies can help your instrument cut through a mix, while cutting low-end frequencies can clean up a muddy sound.
Official Product Video
This video provides an overview of the MXR Ten Band and Six Band EQ pedals, demonstrating their features and capabilities. It highlights how these pedals can be used to shape your sound and achieve various tonal effects.
Maintenance
To ensure the longevity and optimal performance of your MXR Ten Band EQ pedal, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the pedal's exterior. Avoid using abrasive cleaners or solvents, which can damage the finish or internal components.
- Storage: Store the pedal in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity.
- Connections: Periodically check all cable connections for wear and tear. Replace any damaged cables to prevent signal loss or noise.
- Power: Always disconnect the power supply when the pedal is not in use for extended periods.
Troubleshooting
If you encounter issues with your MXR Ten Band EQ pedal, refer to the following common troubleshooting steps:
- No Sound:
- Ensure the power supply is correctly connected and providing 18V DC.
- Check all instrument cables for proper connection and integrity.
- Verify that the pedal's footswitch is engaged (LEDs should be lit).
- Test the pedal in a simpler signal chain (e.g., guitar directly into pedal, then directly into amplifier) to isolate the issue.
- Excessive Noise/Hum:
- Ensure you are using a regulated 18V DC power supply designed for guitar pedals.
- Check for ground loops in your setup.
- Lower the GAIN slider on the pedal.
- Experiment with the frequency sliders; extreme boosts can sometimes introduce noise.
- LEDs Not Lighting Up:
- Confirm the pedal is receiving power.
- If only some LEDs are affected, contact customer support.
If these steps do not resolve the issue, please contact Jim Dunlop customer support for further assistance.
Specifications
| Feature | Detail |
|---|---|
| Model Number | M108S |
| Item Weight | 1 pounds (454 Grams) |
| Product Dimensions | 9.25 x 4 x 2.5 inches (23.5 x 10.2 x 6.4 cm) |
| Power Source | Corded Electric |
| Voltage | 18 Volts |
| Signal Format | Analog |
| Hardware Interface | 1/4-inch Audio |
| Color | Silver |
| Bypass Type | True Bypass |
| Frequency Bands | 10 (31.25Hz to 16kHz) |
| Boost/Cut Range | ±12dB |
| Outputs | Two separate signal chains |
Warranty and Support
For detailed warranty information and customer support, please refer to the official Jim Dunlop website or contact their customer service directly. Keep your proof of purchase for any warranty claims.
You can find more information and products from Jim Dunlop at their official Amazon store: Jim Dunlop Amazon Store.