Rockford Fosgate R1675X2 Prime 6.75" 2-Way Full-Range Speaker

6.75" 2-Way Factory Replacement Speaker Pair 45W RMS, Silk Dome Tweeter, Grilles and Mounting Hardware Included.

Product Overview

The Rockford Fosgate Prime R1675X2 is a pair of 6.75" 2-way full-range speakers rated at 45W RMS designed as a factory replacement for vehicles using the 6.75" speaker format, which is commonly found in Chrysler, Dodge, Jeep, and other North American-derived vehicles alongside various European models. Each speaker combines a vacuum polypropylene cone woofer with a flush-mounted silk dome tweeter and integrated tweeter crossover the same 2-way construction as the R14X2 and R1525X2, scaled to the 6.75" speaker format.

The kit includes two speakers, grilles, and all mounting hardware. At 45W RMS, the R1675X2 shares the same power rating as the 6.5" R165X3 confirmed by Rockford Fosgate in the product description with the benefit of a silk dome tweeter rather than the Piezo design used in the 3-way R165X3. The 6.75" format delivers a larger cone area than 6.5" for improved low-frequency output in the bass and midbass range. Sold as a confirmed pair.

Key Specifications

• Speaker size: 6.75 inch
• Configuration: 2-way full-range
• Power handling (RMS): 45W per speaker (confirmed)
• Peak power: Not specified — confirm with Rockford Fosgate
• Impedance: Not specified — confirm with Rockford Fosgate
• Sensitivity: Not specified — confirm with Rockford Fosgate
• Frequency response: Not specified — confirm with Rockford Fosgate
• Cone material: Vacuum polypropylene
• Surround: Rubber
• Basket: Stamped steel
• Tweeter: Silk dome, flush mounted
• Crossover: Integrated tweeter crossover
• Grilles: Included
• Mounting hardware: Included
• Sold as: Pair (2 speakers — confirmed in product description)
• Mounting depth: Not specified — confirm with Rockford Fosgate
• Cutout diameter: Not specified — confirm with Rockford Fosgate
• Weight: Not specified — confirm with Rockford Fosgate
• Warranty: Not specified — confirm with Rockford Fosgate

Features & Benefits

• 45W RMS Power Handling — The same confirmed 45W RMS rating as the R165X3 (6.5"), applied here to the larger 6.75" format. Matches well with low-powered head units and entry-level amplifiers, while accepting up to 45W RMS from a dedicated amplifier for higher-output installations.
• 6.75" Cone Area — More Bass Output Than 6.5" — The larger 6.75" cone displaces more air than a 6.5" driver, typically delivering improved low-frequency output and extension — a meaningful advantage for vehicles where a dedicated subwoofer is not being fitted and full-range coverage from the door speakers is the goal.
• Silk Dome Flush-Mounted Tweeter — The silk dome tweeter delivers smooth, detailed high-frequency response without the forward character of a Piezo tweeter — making the R1675X2 a warmer-sounding high-frequency presentation than the R165X3 (3-way, Piezo tweeter). Buyers who prefer natural, non-fatiguing highs for extended listening will find the silk dome the more comfortable choice.
• Integrated Tweeter Crossover — Built-in crossover filters high-frequency content to the tweeter. No external crossover component is required — connects directly to existing speaker wiring as a factory replacement.
• Vacuum Polypropylene Cone, Rubber Surround — Moisture-resistant, temperature-stable construction suited to Australian vehicle environments. Rubber surrounds outlast foam alternatives in the heat cycles encountered under summer conditions.
• Grilles and Mounting Hardware Included — Complete installation kit for factory replacement in standard 6.75" speaker positions.

Technical Specs

Compatible With / Goes Well With

Suitable installation positions:

• Factory 6.75" door and panel speaker locations
• Vehicles using 6.75" OEM speaker cutouts — common in Chrysler, Dodge, Jeep, and selected European models

Rockford Fosgate Prime speaker range comparison:

Pairs well with:

• Rockford Fosgate T400-4, T600-4, or T1000-4AD 4-channel amplifiers for amplified operation
• Speaker baffles or spacers if door cavity depth is a constraint

Frequently Asked Questions

Is the R1675X2 sold as a pair or a single speaker?

Confirmed pair — the product description states "kit includes two speakers with grilles, integrated high-pass crossovers and mounting hardware."

How does the R1675X2 differ from the R165X3 (6.5" 3-way)?

Both are rated at 45W RMS. The R1675X2 is a 6.75" 2-way speaker with a silk dome tweeter — producing a warmer, smoother high-frequency character. The R165X3 is a 6.5" 3-way with a Piezo tweeter and separate midrange element — providing a different frequency band distribution. Select the size that matches your vehicle's factory speaker cutout; if your vehicle accepts either size, consider which tweeter character suits your listening preference.

Does the 6.75" size produce more bass than a 6.5" speaker?

The larger 6.75" cone moves more air than a 6.5" driver, which typically results in improved low-frequency output and extension at equivalent power levels. The practical difference between 6.5" and 6.75" is modest, but the 6.75" has a slight advantage in bass reproduction for buyers fitting into vehicles that accept this size.

Does the R1675X2 require an amplifier?

Not necessarily. The 45W RMS rating is compatible with aftermarket head unit output. Sensitivity is not confirmed in the supplier data — confirm the sensitivity spec from the Rockford Fosgate datasheet to assess suitability for factory head unit power levels.

Are grilles included and do they match the speaker styling?

Yes — grilles are included in the kit alongside mounting hardware, ensuring a finished appearance in factory speaker locations.