Introduction
This manual provides essential information for the installation, operation, and maintenance of your AUDIOTEK 660C 6.5-Inch 2-Way Component Car Speakers. The 660C system is designed to enhance your vehicle's audio experience, offering a balanced sound profile with distinct midrange, bass, and clear high frequencies. Each speaker system includes a 6.5-inch woofer, a 1-inch silk-dome tweeter, and a 2-way crossover network.

Image: The complete AUDIOTEK 660C component speaker set, including a woofer, tweeter, crossover, and speaker grille.
Setup and Installation
Proper installation is crucial for optimal performance. It is recommended that installation be performed by a qualified professional. The 660C system is designed for a 4-ohm configuration, compatible with most factory radios and aftermarket amplifiers.
Components Overview:
- 6.5-inch Woofers: Injection-molded polypropylene cone with carbon-fiber finish and treated woven-cloth surround for midrange and bass.
- 1-inch Silk-Dome Tweeters: For clear and detailed high frequencies.
- 2-Way Crossovers: Directs frequencies to the appropriate driver for cohesive sound. Features ferrofluid cooling and a 12 dB-per-octave roll-off.
Mounting Considerations:
- Woofers: The 6.5-inch woofers are designed to fit standard mounting locations. Some vehicles may require specific adapters for proper fitment.
- Tweeters: The 1-inch tweeters can be surface-mounted or flush-mounted using the supplied hardware. Separate placement of woofers and tweeters allows for aiming high frequencies to optimize the listening stage.

Image: Front view of the AUDIOTEK 660C 6.5-inch woofer, showcasing its yellow polypropylene cone and black surround.

Image: Rear view of the AUDIOTEK 660C 6.5-inch woofer, showing the yellow basket, magnet, and speaker terminals.
Wiring and Crossovers:
Connect the woofers and tweeters to the passive crossover units, and then connect the crossovers to your amplifier or head unit. Be aware that the wires supplied with the crossover units may be short. Depending on your installation location, you may need to extend these wires. Ensure all connections are secure and correctly polarized to prevent damage and ensure proper sound reproduction.

Image: The AUDIOTEK 660C silk-dome tweeter shown alongside its yellow and black transparent crossover unit.
Operating Instructions
Once installed, your AUDIOTEK 660C speakers are ready for use. These speakers are designed to produce lively, well-defined sound from compatible car stereos and multichannel amplifier installations.
Power Handling:
- Each speaker handles 90 watts RMS and 325 watts maximum.
- The pair handles 180 watts RMS and 650 watts maximum.
While the speakers have a maximum power rating, it is important to operate them within their RMS power limits to prevent damage and ensure longevity. Exceeding the RMS power consistently can lead to speaker failure. Be mindful of your amplifier's output and avoid pushing the speakers to the point of audible distortion.
Audio Settings:
Utilize your head unit's or amplifier's equalizer settings to fine-tune the sound to your preference. Adjusting bass, midrange, and treble can significantly impact the listening experience. If your head unit lacks an equalizer, consider adding a digital sound processor for more precise audio control.
Maintenance
The AUDIOTEK 660C speakers require minimal maintenance. To ensure optimal performance and longevity:
- Keep the speaker cones and surrounds free from dust and debris. Use a soft, dry cloth for cleaning.
- Avoid exposing the speakers to excessive moisture or extreme temperatures.
- Periodically check wiring connections for tightness and corrosion.
Troubleshooting
If you encounter issues with your AUDIOTEK 660C speakers, refer to the following common problems and solutions:
No Sound from Speakers:
- Check Connections: Ensure all speaker wires are securely connected to the head unit/amplifier, crossovers, woofers, and tweeters. Verify correct polarity.
- Power Source: Confirm the head unit or amplifier is receiving power and is turned on.
- Crossover Function: Ensure the crossover units are correctly wired and functioning.
Distorted or Unclear Sound:
- Power Level: Reduce the volume or amplifier gain. Overpowering the speakers can cause distortion. Operate within the recommended RMS power range.
- Wiring Issues: Check for loose or shorted speaker wires. Incorrect polarity can also cause distortion.
- Crossover Settings: Ensure the crossover is correctly directing frequencies.
- Mounting: Verify that the speakers are securely mounted and not vibrating against surrounding panels. Loose speaker grilles can also cause rattling; ensure they are properly secured or consider alternative mounting if issues persist.
- Head Unit/Amplifier Settings: Adjust equalizer settings. Excessive bass or treble boost can lead to distortion.
Weak Bass Response:
- Polarity: Incorrect wiring polarity can cause bass cancellation. Double-check connections.
- Enclosure: Ensure the speaker is properly sealed in its mounting location or enclosure to maximize bass output.
- Settings: Adjust bass settings on your head unit or amplifier.
Specifications
| Brand | AUDIOTEK |
| Model Number | AT660C |
| Speaker Type | Component |
| Speaker Size | 6.5 inches |
| Woofer Diameter | 6.5 inches |
| Tweeter Size | 1 inch (Silk Dome) |
| RMS Power (per speaker) | 90 watts |
| Max Power (per speaker) | 325 watts |
| RMS Power (per pair) | 180 watts |
| Max Power (per pair) | 650 watts |
| Impedance | 4 Ohm |
| Frequency Response | 70 Hz - 20 kHz |
| Sensitivity | 92 dB |
| Crossover Type | 2-Way Passive, 12 dB/octave roll-off |
| Woofer Cone Material | Injection-molded Polypropylene with Carbon-Fiber Finish |
| Surround Material | Treated Woven Cloth |
| Mounting Type | Car Mount |
| Enclosure Material | Aluminum (Basket) |
| Connectivity Technology | Wired |
Warranty Information
Specific warranty details for the AUDIOTEK 660C speakers are not provided in this manual. Please refer to the product packaging or contact AUDIOTEK directly for comprehensive warranty terms and conditions. Keep your proof of purchase for any warranty claims.
Customer Support
For technical assistance, troubleshooting beyond this guide, or inquiries regarding your AUDIOTEK 660C speakers, please contact AUDIOTEK customer support. Contact information can typically be found on the manufacturer's official website or product packaging.