The Ford Windstar rear door panel accommodates a 6x8 inch speaker size in that location. Full-range units are the compatible types for the audio system. These specifications cover the 1995 to 1998 model 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 on the Ford Windstar positions speakers within the lower portion of the door structure, where the speaker is typically recessed into a molded cavity and mounted against a flat or contoured panel surface.
Door panel installations generally require speakers with a shallow to moderate mounting depth, as the interior door cavity must accommodate both the speaker basket and any clearance needed between the cone and the inner door skin.
A 6x8 inch speaker is an oval format, meaning the cone area is elongated rather than circular, which allows a larger radiating surface to fit within the constrained vertical space typical of a door panel cutout.
The 6x8 inch format, due to its extended cone area relative to a standard round speaker, is capable of moving more air at lower frequencies, which supports bass and lower-midrange reproduction from a door-mounted position.
In the rear door panel of the Ford Windstar, the 6x8 inch speaker placement directs sound into the rear passenger cabin area, where the orientation of the cone faces inward and upward toward occupants seated in the second or third row.
Full-range speakers are designed to reproduce the entire audible frequency spectrum from a single driver, covering low bass through high treble without requiring a separate crossover network or additional driver components.
The full-range type in a rear door panel location handles all frequency content independently, meaning no additional tweeter or subwoofer is specified for the Ford Windstar rear door panel position across the listed model years.
The oval geometry of a 6x8 inch driver introduces minor directional asymmetry compared to a circular cone, with horizontal and vertical dispersion patterns differing slightly depending on cone orientation relative to the door panel cutout.
Mounting a full-range driver in the rear door panel places the speaker at a relatively low position within the vehicle interior, which affects how high-frequency content radiates toward seated passengers given the upward angle toward the listening plane.
The 6x8 inch oval format requires an oval mounting cutout rather than a circular one, making the specific shape of the door panel opening a critical dimension for physical fitment compatibility.