The Lincoln MKS rear door panel accommodates a 6x8 inch speaker size. Full-range units represent the compatible audio system replacement types for the location. The specifications cover the years 2009 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 MKS positions speakers within the lower portion of the door, where the enclosure depth and mounting surface are determined by the door's inner cavity and panel thickness.
Door panel speaker cutouts are typically constrained by structural elements such as window regulators and door hardware, which limits the available mounting depth and affects the maximum cone excursion a speaker can achieve in the space.
A 6x8 inch speaker has an oval footprint with a longer horizontal axis, a geometry that increases cone surface area compared to a standard round 6.5 inch driver while still fitting within typical automotive door panel cutout dimensions.
The enlarged cone area of a 6x8 inch driver allows for greater air displacement than smaller oval or round formats, which supports lower frequency reproduction from a door-mounted position without requiring a dedicated subwoofer enclosure.
In a rear door panel location, the speaker faces toward the cabin interior at an angle influenced by door curvature, which affects the dispersion pattern and the degree to which high-frequency content reaches rear seat passengers directly.
The Lincoln MKS rear door panel accepts a 6x8 inch full-range speaker across the 2009 through 2015 model years, a consistent fitment that reflects no change in the door panel cavity dimensions across the production run.
Full-range speakers are single-driver units designed to reproduce the audible frequency spectrum without requiring a crossover network to divide frequencies among separate drivers.
In a rear door panel installation, a full-range driver handles both midrange frequencies, where vocal and instrumental content is concentrated, and upper frequencies responsible for detail and presence, from a single mounting point.
The lower frequency boundary of a full-range 6x8 inch driver in a door panel installation is influenced by the limited sealed volume behind the cone, as the door cavity is not acoustically optimized and typically leaks, reducing bass extension.
The rear door panel position places the speaker closer to the seated rear passenger than to the front occupants, affecting the balance of direct versus reflected sound energy within the cabin for rear-seat listeners.