Description
Infinity Alpha 603F Coaxial Speakers
The Infinity Alpha 603F is a 6.5-inch (165mm) 2-way coaxial car audio speaker designed by Harman for a powerful and efficient factory speaker upgrade. Featuring a Plus One™ Polypropylene Cone for improved bass output and a PEI Balanced Dome Tweeter for clear, detailed highs, it delivers 60W RMS and 480W peak power with 90dB sensitivity and a 4-ohm impedance. The grille-free design allows for easy installation behind factory door panels.
Plus One™ Polypropylene Cone
This patented Harman architecture extends the cone cone area right up to the edge of the basket. This creates a larger surface area than competing speakers of the same size, resulting in higher sensitivity and better low-frequency bass output.
PEI Balanced Dome Tweeter
Delivers clean, crisp, and well-defined high frequencies while maintaining low distortion at high volumes.
High Factory Compatibility
With a 4-ohm nominal impedance and a 90dB sensitivity rating, these speakers draw power efficiently. They sound vibrant and loud when powered by a low-power factory head unit, though they can also scale well with an aftermarket amplifier.
Key Specifications:
- Speaker Size: 6.5″ (165mm)
- Power Handling: 60W RMS / 480W Peak
- Sensitivity: 90dB @ 2.83V
- Frequency Response: 55Hz – 20kHz
- Nominal Impedance: 4 Ohms
- Type: 2-Way Coaxial
- Plus One™ Polypropylene Cone
- PEI Balanced Dome Tweeter
- Grille-Free Design
- Sold as a Pair
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