Rockford Fosgate R1525X2 5.25" 2-Way Coaxial Speakers

The Rockford Fosgate R1525X2 is a pair of 5.25-inch, 2-way coaxial full-range car speakers designed for factory-speaker replacement and general vehicle audio upgrades. Their 4-ohm nominal impedance supports use with many factory radios and compatible aftermarket amplification. The pair includes grilles and installation hardware for applications where the speakers will be visible.

These Prime Series speakers combine a 5.25-inch midrange driver with a 0.50-inch silk-dome, flush-mounted tweeter. This coaxial layout places the high-frequency driver within the speaker assembly, providing full-range reproduction from a compact mounting location. The specified frequency response is 62 Hz to 20 kHz, with 88 dB sensitivity at 1 watt/1 meter.

A vacuum polypropylene cone and rubber surround form the moving assembly, while a stamped-steel basket provides the mounting structure. The design is intended for conventional door, rear-deck, or other vehicle speaker locations with sufficient mounting clearance. Its 40-watt RMS and 80-watt maximum power ratings provide a practical match for modest factory or aftermarket systems.

The R1525X2 uses an integrated tweeter crossover, keeping the crossover within the speaker basket rather than requiring a separate external crossover box. The tweeter high-pass network is specified at 6 dB. This integrated approach helps simplify wiring for a coaxial-speaker installation.

Before purchase, verify the vehicle's available cutout and rear clearance rather than relying only on the nominal 5.25-inch size. The speaker requires a 4.69-inch mounting diameter and 1.93-inch mounting depth. It can serve as a direct-size replacement where those dimensions, mounting pattern, and 4-ohm system requirements are appropriate.

Key Features

• 5.25-Inch Coaxial Design: Combines midrange and tweeter drivers in each speaker.
• 40-Watt RMS Rating: Supports continuous power handling up to 40 watts.
• Silk-Dome Tweeter: Uses a 0.50-inch flush-mounted silk-dome tweeter.
• Integrated Crossover: Keeps the tweeter high-pass network inside the basket.
• Polypropylene Cone: Uses a vacuum polypropylene cone with rubber surround.
• Included Grilles: Provides grilles, trim rings, and mounting accessories.

Design & Installation

The R1525X2 uses a stamped-steel basket, vacuum polypropylene cone, rubber surround, and flush-mounted silk-dome tweeter. Each speaker is a 2-way coaxial design with an integrated tweeter crossover. Grilles or trim rings are included with this model.

Measure the vehicle opening before installation: the required mounting diameter is 4.69 inches and mounting depth is 1.93 inches. Confirm clearance behind the panel for window, lock, and other moving mechanisms, then connect speaker wiring with correct polarity. The package includes a pair of speakers, grilles or trim rings, 16 feet of 26-gauge speaker wire, speed clips, and mounting screws.