Rockford Fosgate T1675 6.75" 2-Way Coaxial Speakers

The Rockford Fosgate T1675 is a pair of 6.75-inch, 2-way coaxial full-range car speakers designed for replacing factory door or rear-deck speakers. Each speaker uses a 4-ohm design and is rated for 75 watts RMS, making the pair suitable for systems that need more output capability than many factory speakers provide. The coaxial layout combines the woofer and tweeter in one assembly for a straightforward full-range upgrade.

These speakers are intended for listeners seeking a clean, detailed sound from a drop-in-style speaker system. Their 55 Hz to 22 kHz frequency response covers midbass, midrange, and high-frequency duties in a typical vehicle installation. With 89 dB sensitivity at 1 watt/1 meter, they can be used with a compatible aftermarket receiver or an external amplifier.

The T1675 uses a carbon-fiber-reinforced injection-molded polypropylene cone with a butyl-rubber surround. This material combination is designed to provide a rigid woofer diaphragm and durable suspension for automotive use. A pole-mounted aluminum dome tweeter with polyurethane suspension handles high frequencies from the same speaker location.

Rockford Fosgate integrates the crossover within the speaker assembly, so separate external crossover boxes are not required. The integrated concealed crossover helps simplify wiring and keeps the installation more compact. Its offset cantilever coaxial tweeter mounting places the tweeter above the woofer while retaining a conventional round-speaker format.

The T1675 can be used as a front or rear full-range speaker upgrade where vehicle dimensions and mounting clearance allow. FlexFit basket mounting slots and included adapter plates support fitment flexibility, but vehicle-specific fitment should always be checked before purchase. For greater sustained output and control, pair the speakers with amplification appropriate for a 4-ohm load and their 75-watt RMS-per-speaker rating.

Key Features

• 6.75-Inch 2-Way Coaxial Design: Combines woofer and tweeter functions in each speaker.
• 75 Watts RMS Per Speaker: Supports amplifier matching for sustained listening power.
• Aluminum Dome Tweeter: Reproduces high frequencies with a dome-style driver.
• Carbon-Fiber-Reinforced IMPP Cone: Provides a rigid woofer cone construction.
• Integrated Concealed Crossover: Keeps crossover components built into the speaker assembly.
• FlexFit Basket and Adapter Plates: Helps accommodate a range of mounting locations.

Design & Installation

The T1675 uses a black FlexFit basket, carbon-fiber-reinforced injection-molded polypropylene woofer cone, butyl-rubber surround, and aluminum dome tweeter with polyurethane suspension. Rockford Fosgate also uses its Vertical Attach Surround Technique (VAST) construction, which increases usable cone area compared with conventional surround attachment. Grilles and trim rings are included for installations where the speakers will be visible.

Confirm that the vehicle provides at least a 5.68-inch cutout and 2.51 inches of mounting depth before installation; overall rear clearance is listed at 3.62 inches. The package includes mounting hardware and a pair of 5 x 7-inch/6 x 9-inch adapter plates, which may help in compatible locations. Disconnect the vehicle battery negative terminal before installation, observe speaker polarity, and verify door-window and hardware clearance before final mounting.