1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of your PNI CDS04 4-pin condenser microphone. Designed for use with CB radios, this microphone features an electret condenser capsule and a durable Kevlar-reinforced cable. Please read these instructions carefully before use to ensure optimal performance and longevity of your device.
2. Product Features
- Electret Condenser Capsule: Provides clear audio transmission.
- 4-Pin Connector: Standard connection for compatible CB radios.
- Kevlar Reinforced Cable: Enhances durability and extends product life.
- Customizable Pins: Allows for adaptation to various CB radio models by reconfiguring the pins.
- Omnidirectional Polar Pattern: Captures sound from all directions.
- Impedance: 1000 Ohm.
- Cable Length: 1.2 meters.
- Compatible Devices: Designed for two-way radios, including models like Midland Alan 100.
3. What's in the Box
The package contains the following items:
- PNI CDS04 CB Radio Microphone

Image: The PNI CDS04 microphone visible through its clear retail packaging, showing the coiled cable and microphone unit.
4. Setup and Installation
The PNI CDS04 microphone is equipped with a 4-pin connector for compatibility with various CB radio models. Due to its electret condenser capsule, this microphone requires a power supply to function, which is typically provided by the CB radio itself. Ensure your CB radio provides the necessary power for a condenser microphone.
- Inspect the Connector: Verify that the 4-pin connector on the microphone matches the port on your CB radio.
- Connect the Microphone: Carefully insert the 4-pin connector into the microphone port on your CB radio. Ensure a secure connection.
- Pin Configuration (if necessary): The microphone's pins are customizable. If the microphone does not function correctly with your specific CB radio model, you may need to reconfigure the pins. Refer to the wiring diagram provided on the product packaging or consult your CB radio's manual for the correct pinout.

Image: The PNI CDS04 microphone with its coiled cable and the visible 4-pin connector, ready for attachment to a CB radio.

Image: The back of the PNI CDS04 packaging, displaying a wiring diagram for the 4-pin connector, indicating GND, Audio, TX, and RX pins. This diagram is crucial for pin reconfiguration.
5. Operating Instructions
Once connected and powered, operating the PNI CDS04 microphone is straightforward:
- Push-to-Talk (PTT) Button: Locate the PTT button on the side of the microphone. Press and hold this button to transmit your voice. Release the button to listen.
- Speaking Position: Hold the microphone approximately 5-10 cm (2-4 inches) from your mouth for optimal voice clarity. The omnidirectional polar pattern allows for some flexibility in holding angle.
- Volume Control: Adjust the transmission volume using the controls on your CB radio, not on the microphone itself.

Image: Front view of the PNI CDS04 microphone, showing the speaker grille and the PNI logo. The PTT button is located on the side.
6. Maintenance
To ensure the longevity and proper functioning of your PNI CDS04 microphone, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the microphone. Avoid using abrasive cleaners or solvents, which can damage the finish.
- Storage: Store the microphone in a dry place, away from extreme temperatures and direct sunlight, when not in use.
- Cable Care: Avoid sharp bends or excessive pulling on the cable to prevent internal damage. The Kevlar reinforcement provides durability, but proper handling is still recommended.
- Connector Protection: Keep the 4-pin connector clean and free from dust or debris.
7. Troubleshooting
If you encounter issues with your PNI CDS04 microphone, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Microphone does not transmit audio. |
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| Audio is unclear or distorted. |
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| Microphone is not compatible with a specific CB radio model (e.g., Super Star). | Pin configuration differences. | Refer to the wiring diagram (Section 4) and your CB radio's manual to reconfigure the microphone pins to match the radio's specific pinout. |
8. Specifications
| Model Name | CDS04 |
| Brand | PNI |
| Microphone Type | Electret Condenser |
| Connectivity Technology | 4-Pin (XLR type connector) |
| Impedance | 1000 Ohm |
| Polar Pattern | Omnidirectional |
| Cable Length | 1.2 m |
| Special Features | Kevlar reinforced cable, customizable pins |
| Recommended Use | CB Radio Communication |
| Compatible Devices | Two-way radios (e.g., Midland Alan 100) |
| Color | Black |
| Dimensions | 5.5 x 4 x 7.5 cm |
| Frequency Response | 30 Hz - 20 kHz (Transmission: 3 KHz) |
| Power Source | Battery (powered by CB radio) |
| Country of Origin | China |
9. Warranty and Support
The PNI CDS04 microphone comes with a 6-month product warranty. For technical assistance, troubleshooting beyond this manual, or warranty claims, please contact PNI customer support.
You can find additional support resources and contact information on the official PNI website or through the retailer where you purchased the product.

Image: An image representing PNI technical support, indicating available assistance for product users.
For more information, visit the PNI website: PNI CDS04 Product Page