The Lincoln Navigator rear door panel accommodates a 6x8 inch speaker size. Full-range units represent the compatible audio system type for the location. These specifications cover the years 1998 to 2015.
A single driver that reproduces bass through treble without a separate crossover network. It is the simplest replacement option and is common in factory audio systems.
Additional Notes
The rear door panel location in the Lincoln Navigator accommodates 6x8 inch speakers across all listed model years.
A 6x8 inch speaker is an oval-format driver, with the asymmetric dimensions allowing a larger cone area than a standard 6.5 inch round speaker while still fitting within the constrained vertical and horizontal space typical of a door panel cavity.
The oval cone geometry of a 6x8 inch driver produces a wider surface area, which supports stronger low-to-mid frequency output - a characteristic relevant to rear door placement, where bass reinforcement and midrange fill for rear-seat passengers are primary acoustic functions.
Door panel locations are generally flush-mounted or shallow-recessed into the inner door skin, meaning the mounting depth of any installed driver must clear the door's internal mechanical components, including window regulators and structural bracing.
The rear door panel position places speakers at approximately seat-level height for second or third-row passengers, resulting in a near-field listening angle that differs from the more oblique projection angle found in front door or dashboard locations.
Full-range drivers are single-unit speakers designed to reproduce low, mid, and high frequencies from one cone and tweeter assembly, covering a broad frequency spectrum - typically from around 60 Hz to 20 kHz - without requiring a separate crossover network or additional driver components.
In a rear door panel context, the Lincoln Navigator's use of full-range drivers means the installed speaker handles the entire audible spectrum independently at that location, without relying on a supplemental tweeter mounted elsewhere in the rear cabin.
The 6x8 inch format is a standardized oval size in automotive audio, and aftermarket compatibility with Lincoln Navigator rear door panels depends on the speaker's overall frame dimensions and mounting hole pattern conforming to the factory cutout in the door panel.
Oval speakers such as the 6x8 inch size can exhibit slightly different horizontal and vertical dispersion patterns compared to round drivers, with the longer axis influencing directional projection toward the listening position in the rear seating area.
The door panel mounting surface in large SUV rear doors, such as those on the Navigator, typically involves a plastic or composite baffle integrated into the door trim, which affects resonance behavior and the acoustic coupling between the speaker and the enclosure formed by the door cavity itself.