1. Introduction
Thank you for choosing the MDCGPower MDCA6173 9V AC Adapter. This adapter is designed to provide reliable power to compatible devices, including Donner EC748, EC885, EC967, EC886, and EC888 Effect Pedal Power Supplies. Please read this manual carefully before use to ensure proper operation and safety.
2. Safety Information
To prevent electric shock, fire, or damage to the product, please observe the following safety precautions:
- Ensure the input voltage of your device matches the adapter's output voltage (9V).
- Do not expose the adapter to water or excessive moisture.
- Do not disassemble or modify the adapter.
- Avoid using the adapter in extremely hot or cold environments.
- Unplug the adapter from the power outlet when not in use for extended periods.
- This power supply is manufactured with high-quality materials and built-in protection against over current, over voltage, and short circuits, ensuring your devices stay safe.

Image: The adapter features multiple protection mechanisms including over current, over voltage, and short circuit protection for enhanced safety.

Image: The adapter's cable is constructed with high-quality copper wire and PVC insulation, contributing to its safe, stable, and secure operation with intelligent chip and multiple protection features.
3. Package Contents
The package should contain the following items:
- 1 x MDCGPower MDCA6173 9V AC Adapter
Note: If any items are missing or damaged, please contact customer support.
4. Product Features
- Universal Compatibility: World Wide Input Voltage 100-240VAC 50/60Hz.
- Specific Compatibility: Compatible with Donner EC748, EC885, EC967, EC886, EC888 Effect Pedal Power Supplies.
- Safety Protection: Built-in protection against over current, over voltage, and short circuits.
- Compact and Portable: Lightweight design and sturdy casing for easy storage and travel.

Image: The compact design of the adapter, measuring approximately 1.58 inches by 2.92 inches, makes it highly portable.

Image: The adapter offers wide application, compatible with a variety of electronic products beyond just effect pedals, such as monitors, routers, LED strip lights, loudspeakers, printers, and humidifiers.
5. Setup
- Verify Compatibility: Before connecting, ensure your device requires a 9V AC power supply with a barrel connector. Check your device's specifications or existing power adapter.
- Connect to Device: Insert the barrel connector of the MDCGPower AC adapter into the power input port of your electronic device (e.g., Donner effect pedal).
- Connect to Power Outlet: Plug the AC adapter into a standard 100-240VAC 50/60Hz wall outlet.
- Power On: Once connected, your device should receive power. Turn on your device if it has a power switch.

Image: The adapter is shown in a typical use scenario, connected to an electronic device, demonstrating its ease of setup.
6. Operation
The MDCGPower MDCA6173 AC adapter operates automatically once connected to a power source and a compatible device. It provides a stable 9V output to power your equipment.
- Ensure the adapter is securely plugged into both the wall outlet and your device.
- Monitor your device for proper function after connecting the adapter.
- If your device does not power on, refer to the Troubleshooting section.
7. Maintenance
To ensure the longevity and optimal performance of your AC adapter:
- Keep the adapter clean and free from dust. Use a dry, soft cloth for cleaning.
- Store the adapter in a cool, dry place when not in use.
- Avoid bending or crimping the power cord excessively.
- Do not place heavy objects on the adapter or its cable.
8. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on. |
|
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| Adapter feels hot. |
|
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9. Specifications
| Brand | MDCGPower |
| Model Number | MDCA6173 |
| Input Voltage | 100-240VAC, 50/60Hz |
| Output Voltage | 9V |
| Connector Type | Barrel Connector |
| Compatible Devices | Donner EC748, EC885, EC967, EC886, EC888 Effect Pedal Power Supplies, and other compatible 9V devices. |
| Item Weight | 4 Ounces (approx. 113 grams) |
| Color | Black |
| Manufacturer | Guangzhou Panyu Zhaohong Electronic Factory. |
10. Warranty and Support
For warranty information or technical support, please refer to the seller's policy or contact the retailer where the product was purchased. Keep your purchase receipt for warranty claims.
For general inquiries, you may also visit the MDCGPower brand page on Amazon: MDCGPower Store