Rockford Fosgate R168X2 6" x 8" 2-Way Coaxial Speakers

The Rockford Fosgate Prime R168X2 is a pair of 6" x 8" two-way full-range coaxial speakers made for replacing compatible factory vehicle speakers. It provides a practical upgrade path for vehicles whose original speakers sound worn, distorted, or lacking in detail. Each speaker combines a woofer and tweeter in one assembly for straightforward installation in appropriate factory-style locations.

With a 55-watt RMS and 110-watt peak rating per speaker, the R168X2 is suited to factory radios as well as modest aftermarket amplification. Its 4-ohm nominal impedance is typical for car-audio speaker systems. The 51 Hz to 20 kHz frequency response covers bass, midrange, and treble information for everyday music listening.

A vacuum polypropylene cone and rubber surround form the woofer section. This combination is designed to provide a stable moving surface while supporting regular vehicle use. The 1/2-inch silk-dome tweeter handles high-frequency reproduction from a flush-mounted position.

An integrated tweeter high-pass crossover separates high frequencies for the tweeter within the coaxial design. This keeps the installation simpler than a separate-component speaker system because no external crossover box is specified. The R168X2 has a 2-way configuration with a 1-inch voice coil diameter.

The pair is a sensible choice for a targeted door or rear-deck speaker replacement when the vehicle has adequate clearance for its mounting dimensions. It can be used as part of a basic speaker refresh or alongside an aftermarket receiver or amplifier matched to its power handling. Confirm vehicle-specific fitment, factory mounting provisions, and wiring connections before purchase.

Key Features

• 6" x 8" Coaxial Format: Combines woofer and tweeter functions in each speaker.
• 55 Watts RMS Per Speaker: Supports factory-radio and moderate amplified systems.
• Silk-Dome Tweeter: Reproduces upper frequencies through a flush-mounted design.
• Polypropylene Cone: Provides the woofer's primary sound-producing diaphragm.
• Rubber Surround: Supports controlled cone movement during playback.
• Integrated High-Pass Crossover: Directs high frequencies to the tweeter internally.

Design & Installation

The R168X2 uses a stamped-steel basket, vacuum polypropylene cone, rubber surround, and silk-dome flush-mounted tweeter. Its black 6" x 8" speaker assembly is supplied as a pair, without grilles or trim rings for this model. The design is CEA-2031 compliant and Klippel verified.

Each speaker requires a 5.07" x 7.31" mounting cutout and 2.54 inches of mounting depth. Check available depth carefully in a door or rear-deck location, including window and lock operation where applicable. The package includes installation accessories, and the speaker terminals should be wired with correct positive and negative polarity.