Introduction
The Koss SB45-USB Full Size Over-Ear Communication Headset is designed to provide clear audio and voice communication. It features Koss' Clear Voice Technology (CVT) for noise cancellation, making it suitable for PC voice applications, interactive gaming, and speech recognition. The headset includes an electret microphone, an 8-foot cord with a USB connector, and comfortable leatherette ear cushions for sound isolation.

Image: The Koss SB45-USB headset, showing the over-ear design, microphone, and integrated USB plug.
Key Features
- Communications headphone with electret microphone for hands-free communication.
- USB connector for direct plug-and-play compatibility with computers.
- Leatherette ear cushions for enhanced comfort and effective sound isolation.
- Frequency response of 18-20,000 Hz for comprehensive sound quality.
- 8-foot cord for flexible movement.
- 103 dB SPL for clear audio output.
Setup Instructions
- Connect the USB Plug: Insert the USB connector of the headset into an available USB port on your computer.
- Driver Installation: Your operating system should automatically detect and install the necessary drivers. This process may take a few moments.
- Verify Audio Settings: After installation, navigate to your computer's sound settings (e.g., Sound Control Panel on Windows, Sound Preferences on macOS) to ensure the Koss SB45-USB is selected as the default playback and recording device.

Image: A detailed view of the Koss SB45-USB headset's USB plug, ready for connection to a computer.
Video: An overview of the Koss SB45-USB headset, demonstrating its features and connection process.
Operating Instructions
- Adjusting the Headband: Gently slide the earcups up or down along the headband to achieve a comfortable fit over your ears. The headband is adjustable to accommodate various head sizes.
- Positioning the Microphone: The electret microphone is flexible. Position it approximately 1-2 inches from your mouth for optimal voice clarity. The microphone boom can be rotated upwards when not in use.
- Volume Control: Utilize the in-line volume control located on the headset cord to adjust audio playback levels.
- Compact Folding Design: For storage or travel, the headset features a compact folding design. Fold the earcups inwards towards the headband to reduce its size.

Image: The Koss SB45-USB headset on a desk, illustrating the microphone's position for effective communication.
Maintenance
- Cleaning: Use a soft, dry cloth to wipe down the headset and ear cushions. Avoid using harsh chemicals or abrasive materials.
- Storage: When not in use, store the headset in a clean, dry place, ideally utilizing its compact folding design to protect it from damage.
- Cable Care: Avoid sharply bending or twisting the USB cable to prevent internal wire damage.
Troubleshooting
- No Sound from Headset:
- Ensure the USB plug is securely connected to your computer.
- Check your computer's sound settings to confirm the Koss SB45-USB is selected as the default playback device.
- Verify the in-line volume control is not set to minimum or muted.
- Test the headset on a different USB port or another computer to rule out port or system issues.
- Microphone Not Working:
- Confirm the microphone boom is correctly positioned near your mouth.
- Check your computer's sound settings to ensure the Koss SB45-USB microphone is selected as the default recording device and its input level is adequate.
- Ensure the microphone is not muted in any software applications you are using (e.g., video conferencing software).
- Distorted Audio:
- Lower the volume using the in-line control or your computer's system volume.
- Ensure the USB connection is stable and not loose.
Specifications
| Model Name | SB45USB |
| Connectivity Technology | USB |
| Headphones Jack | USB |
| Frequency Response | 18 - 20,000 Hz |
| Impedance | 100 Ohm |
| Noise Control | Sound Isolation |
| Microphone | Electret, Noise Cancellation (Clear Voice Technology) |
| Cable Length | 8 ft |
| Ear Placement | Over Ear |
| Material | Plastic With Leatherette Ear Cups |
| Item Weight | 9.6 ounces |
| Product Dimensions | 9.13 x 7 x 4 inches |
| Compatible Devices | PC/Gaming |
| Audio Driver Type | Dynamic Driver |
| Hardware Interface | USB 1.0 |
Warranty and Support
Koss products are designed for durability and performance. This product is covered by the manufacturer's warranty. For detailed warranty information, product support, or service inquiries, please visit the official Koss website or contact their customer service department. Keep your purchase receipt for warranty claims.
Official Koss Website: www.koss.com



