1. Introduction
The MXR Carbon Copy Analog Delay Pedal (Model M169) delivers a rich, all-analog delay experience. This pedal is designed to provide a wide range of delay effects, from crisp slap echoes to expansive, modulated delays. Its intuitive three-knob layout, combined with internal trim pots for modulation control, offers extensive tonal possibilities. Built with classic bucket-brigade technology, it ensures an authentic, warm analog sound.
Key Features:
- Rich, all-analog delay: Experience the classic warmth and character of analog delay.
- Up to 600 milliseconds of delay time: Versatile delay range for various musical styles.
- Modulation controls emulate tape echo tones: Add depth and movement to your repeats.
- Bucket-brigade technology: Authentic analog signal path for superior tone.
- True bypass: Ensures your dry signal remains unaffected when the pedal is disengaged.
2. Setup
Follow these steps to properly set up your MXR Carbon Copy Analog Delay Pedal:
- Power Connection: The pedal can be powered by a single 9-volt battery or a Dunlop ECB003 AC Adapter (not included). Connect the power supply to the 9V DC jack located on the side of the pedal.
- Input Connection: Connect your guitar or the output of another effect pedal to the 1/4-inch INPUT jack on the right side of the pedal.
- Output Connection: Connect the 1/4-inch OUTPUT jack on the left side of the pedal to your amplifier or the input of another effect pedal.

Figure 1: Side view illustrating input, output, and power connections.
3. Operating Controls
The MXR Carbon Copy features a straightforward control layout for easy tone shaping:

Figure 2: Top view of the pedal with main controls.
- DELAY Knob: Controls the delay time, ranging from 20ms to 600ms.
- MIX Knob: Adjusts the blend of the dry signal with the delayed signal. Turn clockwise for more effect.
- REGEN Knob: Sets the number of repeats (feedback) for the delayed signal.
- MOD Switch: Engages or disengages the modulation effect on the repeats.
- EFFECT Footswitch: Toggles the pedal effect on/off. The blue LED indicates when the effect is active.
4. Modulation Features
The Carbon Copy includes optional modulation to add texture to your delay repeats. This feature can be activated via the MOD switch on the pedal's face. For finer control over the modulation, two internal trim pots are accessible by removing the pedal's bottom plate:
- SPEED Trim Pot: Adjusts the rate of the modulation.
- WIDTH Trim Pot: Controls the depth of the modulation.
Note: Adjusting internal trim pots should be done carefully with a small screwdriver. Excessive force can damage the components.
5. Power Requirements
The MXR Carbon Copy Analog Delay Pedal operates on 9V DC power.
- Battery: A single 9-volt battery can be installed by removing the bottom plate of the pedal.
- AC Adapter: For continuous operation, use a Dunlop ECB003 AC Adapter or a compatible 9V DC power supply with a center-negative plug.
6. Maintenance
To ensure optimal performance and longevity of your pedal:
- Cleaning: Wipe the pedal with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.
- Battery Replacement: If using battery power, replace the 9V battery when the LED indicator dims or the pedal's performance degrades.
- Storage: Store the pedal in a dry, cool environment away from direct sunlight and extreme temperatures.
7. Troubleshooting
If you encounter issues with your pedal, try the following:
- No Sound: Check all cable connections (guitar, pedal, amplifier, power). Ensure the power supply is correctly connected and functioning. If using a battery, replace it with a fresh one.
- Weak Signal/Poor Tone: Verify that all cables are in good condition. Check the settings of your amplifier and other pedals in your signal chain.
- Unwanted Noise: Ensure your power supply is clean and free from interference. Try isolating the pedal from other electronic devices.
8. Specifications
| Model Number | M169 |
| Dimensions (L x W x H) | 5.5" x 2.5" x 4.5" |
| Weight | 1 pound (16 ounces) |
| Power | 9V DC (battery or adapter) |
| Signal Format | Analog |
| Connector Type | 1/4 inch (6.35mm) audio jack |
| Body Material | Electronic Components |
| Color | Green |
9. Official Product Video
Video 1: MXR M169 Carbon Copy Analog Delay. This video provides a demonstration of the pedal's features and sound.
10. Warranty and Support
For warranty information and technical support, please refer to the official MXR website or contact their customer service. Keep your proof of purchase for any warranty claims.





