1. Introduction
The D'Addario PW-CT-9V 9V Power Adaptor is designed to provide consistent, reliable power to your guitar pedals and other 9-Volt devices, eliminating the need for batteries. This adaptor converts standard AC wall power to 9-Volt DC, ensuring stable performance for your musical equipment.

Image 1.1: The D'Addario PW-CT-9V 9V Power Adaptor, showing the main unit with its integrated power cord and barrel connector.
2. Safety Information
- Read all instructions before use.
- Do not expose the adaptor to water, moisture, or extreme temperatures.
- Do not attempt to disassemble or modify the adaptor. There are no user-serviceable parts inside.
- Use only with devices requiring 9V DC power with a tip-negative polarity and a 2.1mm barrel connector. Using with incompatible devices may cause damage.
- Ensure the power outlet is easily accessible for quick disconnection if needed.
- Unplug the adaptor during lightning storms or when unused for long periods.
3. Package Contents
Your D'Addario PW-CT-9V 9V Power Adaptor package should contain the following:
- 1 x D'Addario PW-CT-9V 9V Power Adaptor

Image 3.1: The retail packaging for the D'Addario PW-CT-9V 9V Power Adaptor.
4. Setup
Follow these steps to set up your D'Addario PW-CT-9V Power Adaptor:
- Verify Compatibility: Ensure your guitar pedal or device requires 9V DC power and has a 2.1mm barrel input with tip-negative polarity. This adaptor is designed for such specifications.
- Connect to Device: Insert the barrel connector end of the PW-CT-9V adaptor into the power input jack of your guitar pedal or compatible device.
- Connect to Power Outlet: Plug the AC plug of the adaptor into a standard 100-240V AC wall outlet.
- Power On: Once connected, your device should receive power. If your device has a power switch, turn it on.
The adaptor is designed to provide a filtered output for noise-free operation, ensuring clean power to your audio equipment.
5. Operating Instructions
The D'Addario PW-CT-9V Power Adaptor operates automatically once connected to a power source and a compatible device. It provides a continuous 9V DC supply. There are no user controls on the adaptor itself.
- Ensure all connections are secure before operating your device.
- To disconnect power, unplug the adaptor from the wall outlet first, then from your device.
6. Maintenance
The D'Addario PW-CT-9V Power Adaptor requires minimal maintenance:
- Cleaning: Wipe the adaptor with a soft, dry cloth. Do not use liquid cleaners or solvents.
- Storage: Store the adaptor in a cool, dry place when not in use. Avoid wrapping the cord too tightly around the adaptor to prevent damage.
- Inspection: Periodically inspect the cord and connectors for any signs of damage, fraying, or bending. If damage is observed, discontinue use immediately.
7. Troubleshooting
If you encounter issues with your D'Addario PW-CT-9V Power Adaptor, refer to the following common solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Device not powering on. |
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| Humming or noise from device. |
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8. Specifications
| Feature | Detail |
|---|---|
| Model | PW-CT-9V |
| Input | 100-240Vac |
| Output | 9Vdc, 800mA |
| Barrel Size | 2.1mm |
| Polarity | Tip Negative (-) |
| Cord Length | 72 inches (approx. 1.8 meters) |
| Material | Plastic |
| Item Weight | 50 Grams |
| Color | Black |
| Features | Filtered output for noise-free operation, Short circuit protection |
9. Warranty and Support
For warranty information and technical support, please visit the official D'Addario website or contact their customer service directly. Keep your purchase receipt as proof of purchase.
D'Addario Official Website: www.daddario.com





