Introduction
Thank you for choosing Koss KSC75 Portable Stereo Headphones. These headphones are designed to provide high-quality audio in a comfortable, clip-on design, ideal for portable use. This manual provides essential information for setting up, operating, maintaining, and troubleshooting your headphones to ensure optimal performance and longevity.
Product Overview

Figure 1: Front and side view of the Koss KSC75 Portable Stereo Headphones. The image displays two headphone units: one facing forward, showing the Koss logo and speaker grille, and the other rotated to the side, highlighting the ear clip mechanism and foam earpad. Both units are silver with black foam pads and a black cable extending downwards.
Key Features:
- Comfortable clip-on design for secure fit.
- High-fidelity sound reproduction.
- Lightweight and portable.
- Durable construction for everyday use.
Package Contents
Ensure all items are present before proceeding with setup.
- Koss KSC75 Portable Stereo Headphones
- Integrated Audio Cable (1.2 meters)
Setup
Connecting Your Headphones:
- Locate the 3.5mm audio jack on your audio device (smartphone, tablet, computer, MP3 player, etc.).
- Insert the 3.5mm plug of the Koss KSC75 headphones firmly into the audio jack of your device.
- Ensure the connection is secure to prevent audio interruptions.
Wearing the Headphones:
- Gently open the ear clips.
- Position the foam earpads over your ears, ensuring they sit comfortably and securely. The clips should rest behind your ears.
- Adjust the position for optimal sound and comfort.
Operating Instructions
Audio Playback:
Once connected, audio from your device will be routed through the headphones. Control playback (play, pause, skip) and volume directly from your connected audio device.
Volume Control:
The Koss KSC75 headphones feature an in-line volume control. Adjust the slider or dial on the cable to increase or decrease the audio volume to your desired level. For optimal sound quality and to prevent hearing damage, avoid listening at excessively high volumes for extended periods.
Maintenance
Cleaning:
- Use a soft, dry cloth to wipe the exterior surfaces of the headphones.
- For the foam earpads, gently dab with a slightly damp cloth if necessary, and allow to air dry completely before use. Do not immerse in water.
- Avoid using harsh chemicals, solvents, or abrasive cleaners.
Storage:
When not in use, store your headphones in a clean, dry place away from extreme temperatures, humidity, and direct sunlight. Avoid tangling the cable by coiling it loosely.
Cable Care:
To prolong the life of the audio cable, avoid sharp bends, excessive pulling, or wrapping it tightly around objects. Always grasp the plug, not the cable, when disconnecting from a device.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound or low volume |
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| Distorted sound |
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| Sound only from one side |
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If the issue persists after trying these solutions, please contact Koss customer support.
Specifications
| Feature | Detail |
|---|---|
| Model Name | KSC75 |
| Connectivity Technology | Wired |
| Headphones Jack | 3.5 mm Jack |
| Frequency Range | 15 Hz - 25 kHz |
| Impedance | 60 Ohm |
| Cable Length | 1.2 Meters |
| Item Weight | 43 Grams (1.52 ounces) |
| Ear Placement | Over Ear |
| Form Factor | On Ear |
| Control Type | Volume Control |
| Material | Foam |
| Color | Gray |
Warranty Information
Koss products are known for their durability and sound quality. For specific warranty details and terms, please refer to the warranty card included with your purchase or visit the official Koss website. Keep your proof of purchase for warranty claims.
Support
For further assistance, technical support, or inquiries regarding your Koss KSC75 headphones, please contact Koss customer service:
- Visit the official Koss website: www.koss.com
- Refer to the contact information provided on the Koss packaging or website for phone and email support.




