Infinity REF607FSL
Infinity REF607FSL Reference Series 6.5" Coaxial Speakers User Manual
Model: REF607FSL
1. Introduction
Thank you for choosing Infinity Reference Series 6.5" Coaxial Speakers. These speakers are engineered to deliver Infinity's signature sound with smooth, clear highs and enhanced bass output. This manual provides essential information for the proper installation, operation, and maintenance of your new speakers to ensure optimal performance and longevity.
2. Safety Information
Please read all safety instructions carefully before installing or operating the speakers. Failure to follow these guidelines may result in injury or damage to the product or vehicle.
- Professional Installation Recommended: If you are unsure about any part of the installation process, consult a qualified car audio technician.
- Disconnect Battery: Always disconnect the vehicle's negative battery terminal before beginning any electrical work to prevent short circuits.
- Wiring: Ensure all wiring is properly insulated and secured to prevent pinching, chafing, or shorting. Use appropriate gauge wire for connections.
- Mounting: Securely mount speakers to prevent them from becoming loose during vehicle operation, which could cause injury or damage.
- Volume Levels: Prolonged exposure to high volume levels can cause hearing damage. Adjust volume to a comfortable level.
- Environmental Conditions: These speakers are not waterproof. Avoid exposure to water or excessive moisture.
3. What's in the Box
Verify that all components are present in the packaging:
- 1 pair of shallow-mount coaxial speakers
- 1 pair of adapter rings
- 8 large mounting screws
- 8 speed clips
- 8 small mounting screws
- Foam mounting tape
- Owner’s manual (this document)

Image: Packaging for the Infinity Reference Series speakers, displaying the product and branding.
4. Setup and Installation
The Infinity REF607FSL speakers are designed for easy integration into most factory speaker locations. Follow these general steps for installation:
- Preparation: Disconnect the vehicle's negative battery terminal. Remove existing speakers or access the speaker mounting locations.
- Mounting: Place the new Infinity speaker into the desired mounting location. Use the provided adapter rings if necessary to ensure a proper fit. Secure the speaker using the large or small mounting screws and speed clips as appropriate for your vehicle.
- Wiring: Connect the speaker wires from your vehicle's audio system to the terminals on the Infinity speaker. Ensure correct polarity (positive to positive, negative to negative) for optimal sound performance.
- Tweeter Output Level Control: The Reference series speakers feature an adjustable tweeter output level control. This allows you to optimize the high-frequency response based on your installation location and listening preference. Adjust this control before reassembling the vehicle's interior panels.
- Testing: Before fully reassembling, reconnect the vehicle's battery and test the speakers to ensure they are functioning correctly.
- Final Assembly: Once confirmed, reassemble all interior panels and trim pieces.

Image: A pair of Infinity Reference Series 6.5 inch coaxial speakers, ready for installation.

Image: Close-up front view of one Infinity Reference Series speaker, highlighting the tweeter and Plus One™ woofer cone.

Image: Rear view of an Infinity Reference Series speaker, showing the magnet structure and wiring terminals.

Image: Side profile of the speaker, illustrating its shallow-mount design.
5. Operating Instructions
Once properly installed, your Infinity REF607FSL speakers will deliver high-quality audio. These speakers are designed for smooth, non-fatiguing sound even at high output levels.
- Audio Source: Connect your vehicle's head unit or amplifier to the speakers.
- Volume Control: Adjust the volume through your vehicle's audio system. Avoid setting the volume to levels that cause audible distortion, as this can damage the speakers.
- Tweeter Adjustment: If your speakers have the tweeter output level control, experiment with different settings to find the sound profile that best suits your listening preferences and vehicle acoustics.
- Break-in Period: Like all new speakers, a short break-in period (typically 10-20 hours of normal use) may be beneficial for the speaker components to settle and achieve their optimal sound characteristics.
6. Maintenance
Your Infinity speakers require minimal maintenance to ensure long-lasting performance.
- Cleaning: Use a soft, dry cloth to gently wipe down the speaker grilles and cones. Do not use harsh chemicals, solvents, or abrasive cleaners.
- Moisture: These speakers are not waterproof. Avoid exposing them to direct water spray or excessive moisture. If they become wet, allow them to dry completely before use.
- Inspection: Periodically check speaker connections and mounting screws to ensure they remain secure.
7. Troubleshooting
If you experience issues with your speakers, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No sound from speakers | Loose or incorrect wiring No power to head unit/amplifier Speaker damaged | Check all wiring connections for proper polarity and secure fit. Ensure head unit/amplifier is powered on. If wiring is correct and power is present, speaker may be damaged and require replacement. |
| Distorted sound | Volume too high Incorrect amplifier gain settings Loose mounting Damaged speaker cone/surround | Reduce volume. Adjust amplifier gain settings to match head unit output. Check speaker mounting for tightness. Inspect speaker cone and surround for visible damage. |
| Weak bass or highs | Incorrect polarity Tweeter level setting Crossover settings | Verify speaker wire polarity. Adjust the tweeter output level control. Check head unit or amplifier crossover settings. |
If the problem persists after attempting these solutions, please contact Infinity customer support or a qualified car audio technician.
8. Specifications
Key technical specifications for the Infinity REF607FSL speakers:
- Model Name: REF607FSL
- Speaker Type: Coaxial
- Speaker Size: 6.5 Inches
- Woofer Diameter: 6.5 Inches
- Mounting Type: Flush Mount
- Speaker Maximum Output Power: 110 Watts
- Frequency Response: 21000 Hz (Upper limit, typical range is broader)
- Product Dimensions: 14.92"D x 3.27"W x 7.95"H
- Item Weight: 3.4 Pounds
- Connectivity Technology: Coaxial
- Is Waterproof: FALSE
- Included Components: 1 pair of adapter rings, 1 pair of shallow-mount coaxial speakers, 8 large mounting screws, 8 speed clips, 8 small mounting screws, Foam mounting tape, Owner’s manual
9. Warranty and Support
Your Infinity REF607FSL speakers come with a Limited Warranty. Please refer to the warranty card included in your product packaging for specific terms and conditions, including coverage duration and limitations.
For technical support, troubleshooting assistance, or warranty claims, please visit the official Infinity website or contact their customer service department. Keep your proof of purchase for warranty validation.
Online Resources: For additional information, FAQs, and product registration, please visit the official Infinity website.
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