1. Introduction
The FIFINE K669S USB Microphone is a high-quality condenser microphone designed for clear audio capture in various applications, including online meetings, virtual classes, streaming, and recording. Its plug-and-play functionality ensures easy setup with Windows and Mac computers.
Key features include a convenient gain control knob for instant volume adjustment or muting, a cardioid polar pattern for focused sound capture, and a durable all-metal construction. The microphone comes with a pivot mount and a mini tripod stand for flexible positioning.

Figure 1.1: FIFINE K669S USB Microphone with included tripod stand and USB cable.
2. Setup Guide
2.1. Package Contents
Before proceeding with the setup, please ensure all components are present in the package:
- FIFINE K669S Condenser Microphone with Pivot Mount
- 6ft Non-detachable USB Cable
- Tripod Stand
- User Manual (this document)
2.2. Connecting the Microphone
The FIFINE K669S microphone is designed for plug-and-play operation, requiring no additional drivers for most operating systems.
- Assemble the Tripod Stand: Screw the microphone onto the included tripod stand using the pivot mount. Adjust the angle as desired.
- Connect to Computer: Plug the USB cable from the microphone directly into an available USB port on your Windows PC or Mac computer.

Figure 2.1: The microphone connects directly to your computer via USB for immediate use.
2.3. Selecting the Microphone as Input Device
After connecting, you may need to select the FIFINE K669S as your default audio input device in your computer's sound settings or within specific applications (e.g., Zoom, Discord, WebEx).
- For Windows: Go to Sound Settings > Input and select "USB PnP Audio Device" as your input device.
- For Mac: Go to System Preferences > Sound > Input and select "USB PnP Audio Device".

Figure 2.2: Ensure "USB PnP Audio Device" is selected as your input in system sound settings.
3. Operating Instructions
3.1. Gain Control Knob
The microphone features a volume knob on the front for convenient control over your audio input level. This knob allows you to:
- Increase/Decrease Volume: Turn the knob clockwise to increase the microphone's sensitivity and counter-clockwise to decrease it.
- Mute: Turn the knob all the way down (counter-clockwise) to effectively mute the microphone.

Figure 3.1: The gain control knob allows for quick adjustments to your microphone's input level.
3.2. Cardioid Polar Pattern
The K669S utilizes a cardioid polar pattern, which means it primarily picks up sound from the front of the microphone, while rejecting sounds from the sides and rear. This design helps to:
- Focus on your voice, reducing unwanted background noise.
- Improve clarity for spoken word applications like online meetings and voiceovers.
For optimal performance, position the microphone directly in front of you, facing the sound source.

Figure 3.2: The cardioid pattern effectively captures your voice while minimizing ambient noise.
3.3. General Usage Tips
- Application Volume Settings: Some applications (e.g., Zoom, Discord) have automatic volume adjustment features. To prevent sudden volume changes, it is recommended to disable these features within the application's audio settings.
- Proximity: For clearer audio, especially in quiet environments, position the microphone closer to your mouth.
- Webcam Integration: If using with a webcam, ensure the K669S is selected as the primary input device in your video conferencing software.

Figure 3.3: Disable automatic volume adjustment in applications for consistent audio levels.
4. Maintenance
Proper care will extend the life and performance of your FIFINE K669S microphone.
- Cleaning: Use a soft, dry cloth to wipe the microphone's exterior. Avoid using liquid cleaners or solvents, as they may damage the finish or internal components.
- Storage: When not in use, store the microphone in a clean, dry place away from extreme temperatures, humidity, and direct sunlight.
- Handling: Handle the microphone with care. Avoid dropping it or subjecting it to strong impacts, which can affect its performance.
5. Troubleshooting
If you encounter issues with your FIFINE K669S microphone, please refer to the following common solutions:
| Problem | Possible Solution |
|---|---|
| No sound or low volume from microphone. |
|
| Microphone not recognized by computer. |
|
| Sound is distorted or unclear. |
|
| Incompatible with Xbox. | The FIFINE K669S USB Microphone is not compatible with Xbox gaming consoles. It is designed for use with Windows PCs and Mac computers. |
6. Specifications
| Feature | Detail |
|---|---|
| Brand | FIFINE |
| Model Name | K669S |
| Microphone Form Factor | Mini Desktop |
| Connectivity Technology | USB |
| Connector Type | USB |
| Polar Pattern | Unidirectional (Cardioid) |
| Power Source | USB Powered |
| Material | Metal |
| Signal-to-Noise Ratio | 70 dB |
| Hardware Platform | Laptop, Mac, PC |
| Item Dimensions (L x W x H) | 2.32 x 7.05 x 7.24 inches |
| Item Weight | 1.14 pounds |
| Included Components | Condenser Mic, Tripod Stand |
| Special Feature | Gain Control Knob, Plug and Play, Desktop Mic |
7. Warranty Information
Specific warranty details for the FIFINE K669S microphone are typically provided at the point of purchase or within the product packaging. Please retain your proof of purchase for any warranty claims. For detailed warranty terms and conditions, refer to the official FIFINE website or contact their customer support.
8. Customer Support
For further assistance, technical support, or inquiries regarding your FIFINE K669S USB Microphone, please visit the official FIFINE website or contact their customer service department. Contact information can usually be found on the manufacturer's website or in the product packaging.
You can also refer to the FIFINE Store on Amazon for additional product information and resources.





