Infinity PR8612CF 6x8" Two-Way Car Speaker Set

The Infinity Primus PR8612CF is a pair of 6 x 8-inch, two-way multi-element car speakers designed for replacing compatible factory-installed speakers. It provides a practical upgrade path for vehicles using the common 6 x 8-inch speaker format. Its 2.7-ohm nominal impedance and 55-watt RMS power handling support use with an appropriate factory or aftermarket audio system.

This speaker set is intended for listeners who want fuller, more detailed sound from a vehicle’s front or rear speaker locations without adding separate tweeters. The two-way design combines a woofer and an edge-driven tweeter in each speaker. Its specified frequency response spans 49Hz to 20kHz for bass, midrange, and treble reproduction.

Infinity uses Plus One polypropylene woofer cones to increase usable cone area compared with conventional cones of the same class. The woofers also use hi-roll rubber surrounds made with automotive-grade materials. Together, these materials are designed to support low-frequency output and long-term durability in vehicle environments.

Each PR8612CF speaker uses an edge-driven tweeter for broad high-frequency dispersion. The speaker set has a specified sensitivity of 88.5dB at 2.83V and a 1-inch voice coil. Its 4.7kHz crossover point separates the woofer and tweeter operating ranges within the two-way design.

The PR8612CF can be used as a direct replacement where vehicle mounting space, cutout dimensions, and wiring are compatible. Verify the 7-1/4 x 5-inch mounting cutout and 2-19/64-inch mounting depth before installation. For amplified systems, match the amplifier or source unit to the speakers’ 2.7-ohm nominal impedance and 55-watt RMS power-handling rating.

Key Features

• 6 x 8-Inch Two-Way Design: Combines woofer and tweeter drivers in each speaker.
• 55W RMS Power Handling: Supports properly matched factory or aftermarket amplification.
• Plus One Polypropylene Woofer: Uses increased cone area for efficient output.
• Hi-Roll Rubber Surround: Supports controlled cone movement and durability.
• Edge-Driven Tweeter: Provides broad high-frequency dispersion from each speaker.
• 2.7-Ohm Nominal Impedance: Uses low-impedance voice coils for compatible car audio systems.

Design & Installation

The PR8612CF uses polypropylene woofer cones, hi-roll rubber surrounds, and edge-driven tweeters in a 6 x 8-inch multi-element speaker format. Each speaker has a 1-inch voice coil and an external frame size of 8-11/16 x 5-5/8 inches. Infinity also specifies individual speaker voicing and Harman reliability testing for the Primus line.

Confirm available mounting space before purchase: the specified mounting cutout is 7-1/4 x 5 inches, total depth is 2-11/16 inches, and mounting depth is 2-19/64 inches. Install the pair with correct positive and negative polarity, use the included foam gasket where applicable, and confirm that the vehicle wiring and source unit or amplifier are suitable for a 2.7-ohm speaker load. The package includes two speakers, one foam gasket, two brand stickers, and an owner's manual.