The Lincoln LS rear door panel accommodates a 6x8 inch speaker size across all listed model years. Full-range units represent the compatible audio system type for each entry in the replacement chart. These specifications cover the 2000 to 2006 model year range.
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 LS positions speakers within the lower portion of the door cavity, a mounting environment that typically places the driver at roughly seat-level height and angles the radiating surface toward the cabin interior.
Door panel speaker cutouts are constrained by the internal door structure, including window mechanisms, wiring harnesses, and vapor barriers, all of which define the available depth and diameter of the mounting space.
The 6x8 inch oval format is an elongated speaker geometry where one axis measures 6 inches and the other measures 8 inches, a shape designed to fit mounting locations that cannot accommodate a circular driver of equivalent cone area.
The oval geometry of a 6x8 inch driver produces a cone surface area comparable to a circular driver in the 6.5 to 7 inch range, which influences the volume of air the driver can move and therefore its low-frequency output capability.
At the rear door panel location, the larger cone area of a 6x8 inch driver relative to smaller oval formats supports extended low-mid frequency reproduction, which contributes to warmth and body in music playback from that position in the cabin.
The Lincoln LS rear door panel accepts only full-range speaker types across all listed model years, meaning the specified driver must reproduce the entire audible frequency spectrum - from bass through treble - from a single cone or a coaxial configuration without a dedicated crossover network splitting frequencies to separate enclosures at that location.
Full-range drivers used in door panel locations typically employ a main woofer cone for low and mid frequencies alongside a small integrated tweeter for high-frequency reproduction, a configuration that allows a single mounting point to cover the broadest possible frequency range.
In a rear door panel position, a full-range driver handles frequencies that would otherwise require separate woofer and tweeter placements, consolidating the acoustic output into 1 mounting location per door.
The rear door panel mounting surface is generally a flat or slightly curved section of the interior door trim, and the speaker basket must mate flush with the mounting ring to maintain the acoustic seal necessary for proper low-frequency reproduction.
Door-mounted speakers are subject to mechanical vibration transmitted through the door structure itself, as road inputs and door operation can affect the speaker basket, magnet assembly, and cone suspension over time.