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Description

Infinity PRIMUS 603F

The Infinity Primus 603F is a 6.5″ 2‑way coaxial car speaker designed to upgrade your vehicle’s audio with clear, balanced sound and improved low-frequency response. It features Plus One™ polypropylene woofer cones for increased cone area and stronger bass, paired with edge-driven textile dome tweeters for smooth, detailed highs. With a 3‑ohm impedance (true 4 Ω load in use) and 90 dB sensitivity, the Primus 603F delivers efficient performance even with factory head units. Its compact, easy-to-install design makes it a reliable choice for enhancing your car’s sound with clearer mids, stronger bass, and crisp highs.


Specifications

General Specifications Details
Woofer 6-1/2″ Polypropylene Driver
Tweeter 1/2″ Silk Dome
Power Handling 50W RMS, 150W Peak
Sensitivity (2.83V@1m) 92 dB
Frequency Response (-6dB) 55Hz – 20kHz
Nominal Impedance 3.0 Ohms
Crossover Point 5kHz @ 6dB/octave

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Questions and Answers

Q1: What is the Infinity Primus 603F?

A1: The Infinity Primus 603F is a 6.5″ 2-way coaxial speaker designed to provide clearer, more balanced sound than standard factory speakers.

Q2: What materials are used?

A2: It features Plus One™ polypropylene woofers for stronger bass and edge-driven textile dome tweeters for smooth highs.

Q3: What is its impedance and sensitivity?

A3: It has a 3 Ω impedance (true 4 Ω load in use) and 90 dB sensitivity, ensuring loud and efficient sound even with OEM head units.

Q4: Is it easy to install?

A4: Yes — its compact 6.5″ design fits most standard factory speaker locations.

Q5: Is it suitable for factory systems?

A5: Yes, it is ideal for a factory speaker upgrade without needing an external amplifier.


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