The
Infinity Primus PR503F is
a high-efficiency 5-1/4" (5.25") two-way coaxial car speaker pair built to upgrade dull factory sound with crisp, lifelike details.
Unlike the component "CF" version, this model features a coaxial setup with the silk dome tweeter mounted directly in the center of the main woofer cone.
Technical Specifications
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Power Handling: 40 Watts RMS (120 Watts Peak per speaker)
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Impedance: 3-Ohm (True Four Ohm design draws extra power out of standard factory wires safely)
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Frequency Response: 75 Hz – 20,000 Hz
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Sensitivity: 91 dB at 2.83V
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Woofer Mounting Depth: 1.812" (1-13/16")
Key Features
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Plus One™ Woofer Architecture: Patented polypropylene cones expand overall surface area by up to 35%, boosting midbass output and overall speaker efficiency. []
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Edge-Driven Silk Dome Tweeters: The 3/4" silk dome tweeters deliver smooth high frequencies and clear vocals without harsh harmonic distortion at high volumes.
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Vented Basket Frame Design: Super-rigid baskets utilize active air venting to cool down voice coils during long playback sessions, extending the life of your hardware.
- Aesthetic Integration: Features an all-black design accented with a radial starburst pattern and a mirror-like copper logo badge.
Audio Performance
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RMS Power Handling: 40 Watts
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Peak Power Handling: 120 Watts
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Frequency Response: 75 Hz – 20,000 Hz
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Sensitivity: 91 dB at 2.83V
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Impedance: 3-Ohm True Four Ohm technology
Driver & Material Details
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Speaker Design: 2-Way Coaxial System
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Woofer Size: 5-1/4" (5.25")
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Woofer Composition: Plus One+ Polypropylene
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Woofer Surround: Hi-Roll Rubber
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Tweeter Size: 3/4"
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Tweeter Design: Edge-driven dome
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Tweeter Composition: Silk
Physical Dimensions
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Woofer Top-Mount Depth: 1.812" (1-13/16")
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Woofer Bottom-Mount Depth: 2-1/16"
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Cutout Diameter: 4.687" (4-11/16")
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Mounting Height: 0.44"
System Features
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Crossover: Integrated on-speaker network
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Tweeter Level Control: Fixed (Standard attenuation handled via integrated network)
- Grilles: Included in the box
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