Infinity Primus 6.5-Inch Car Speaker Upgrade Combo by Harman (PR6510CSHI 2-Way Component + PR6512IS 2-Way Coaxial)

Product Overview

Upgrade your vehicle's factory sound system with world-renowned Harman audio precision—the Infinity Primus 6.5-Inch Complete Car Speaker Combo. Engineered to replace flat, underpowered factory door speakers, this package pairs the high-definition Infinity Primus PR6510CSHI 6.5-inch Component System for the front stage with the Infinity Primus PR6512IS 6.5-inch Coaxial Speakers for rear-seat surround fill. 

Featuring Infinity’s patented Plus One polypropylene woofer cones and edge-driven silk dome tweeters, this 4-door speaker combo delivers crystal-clear vocal stage height, deep mid-bass impact, and crisp instrument separation—whether powered directly by your stock factory stereo or an aftermarket amplifier.

Key Features & Performance Highlights

• Harman Signature Sound Quality: Engineered and voice-tuned by Harman transducer engineers to deliver punchy bass, natural midrange clarity, and non-fatiguing high frequencies.

• Patented Plus One Polypropylene Cones: Increases effective radiating cone surface area by up to 35% over standard 6.5-inch speakers for deeper low-end extension and tighter mid-bass slam.

• Edge-Driven Silk Dome Tweeters: Front-stage edge-driven silk tweeters project smooth, detailed treble without harshness, creating a wide acoustic stage across your dashboard.

• True 4-Ohm High-Efficiency Architecture: High sensitivity design extracts maximum volume and clarity even from low-powered factory head units without requiring custom wiring modifications.

• Complete 4-Door Stage Setup: Front component speakers (woofers + separate tweeters + crossovers) establish high-mounted vocals, while rear coaxial 2-way speakers provide rich full-range sound for passengers.

Technical Specifications

• Brand & Series: Infinity by Harman (Primus Series)

• Package Includes: 1 Pair Front Component Speakers (PR6510CSHI) + 1 Pair Rear Coaxial Speakers (PR6512IS)

• Front Stage Setup: 2-Way Component System (6.5-Inch Woofer + Independent Edge-Driven Silk Dome Tweeter)

• Rear Stage Setup: 2-Way Coaxial System (6.5-Inch Woofer + Integrated Silk Dome Tweeter)

• Woofer Size: 6.5 Inch (165 mm)

• Power Handling (Front Stage): 80W Total RMS / 320W Peak (Per Pair)

• Power Handling (Rear Stage): 55W RMS / 165W Peak (Per Pair)

• Sensitivity (@ 2.83V/1M): 88.5 dB (Front) / 88 dB (Rear)

• Frequency Response: 53 Hz – 20,000 Hz

• Acoustic Impedance: True 4-Ohm Architecture (2.7 Ohm nominal coil)

• Woofer Cone Material: Patented Plus One Polypropylene Woofer Cone with Hi-Roll Rubber Surround

Frequently Asked Questions (FAQs)

1. Will this Infinity Primus speaker combo fit my car?

Yes, both the PR6510CSHI components and PR6512IS coaxials feature standard 6.5-inch (165mm) round geometry,making them a direct fit for the front and rear doors of most hatchbacks, sedans, and SUVs on the road today.

2. Can I run this Infinity combo directly off my stock factory radio?

Yes. Thanks to high sensitivity ratings and True 4-Ohm high-efficiency architecture, these speakers perform efficiently on standard factory head units. However, adding a 4-channel amplifier will further unlock their full mid-bass impact and dynamic volume range.

3. What is included inside this 4-door speaker combo pack?

The package includes 2 x 6.5" front woofers, 2 x edge-driven silk tweeters with flush/surface mount pods, 2 x inline crossover networks, 2 x 6.5" rear coaxial speakers, protective grilles, mounting screws, speed clips, and installation hardware.