The Ford Windstar side cargo area doors accommodate a 6x8 inch speaker size in all listed configurations. Full-range units represent the compatible audio system replacement types for the location. These specifications cover the years 1999 to 2003.
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 side cargo area doors of the Ford Windstar are a rear-zone mounting location, placing speakers in close proximity to rear passengers and cargo space rather than near the primary listening position at the front seats.
A 6x8 inch oval driver occupies a larger cone surface area than a standard round 6.5 inch speaker, which increases low-frequency displacement and allows the driver to reproduce bass and lower midrange frequencies with greater efficiency from a door-mounted position.
The oval geometry of a 6x8 inch driver is a design response to shallow door cavities, where the elongated shape fits within the limited depth and height of a door panel cutout while still delivering sufficient radiating area.
Door-mounted speakers in a cargo area position typically face inward toward the cabin rather than toward a direct listening axis, which affects the dispersion pattern and the degree to which high-frequency content reaches seated occupants.
The Ford Windstar side cargo area doors in the 1999 through 2003 model years share a consistent 6x8 inch mounting specification, indicating a stable opening dimension and depth clearance across the entire production span covered.
Full-range drivers are designed to reproduce the entire audible frequency spectrum - from bass through treble - within a single cone and tweeter assembly or a single cone alone, without requiring a separate crossover network to divide the signal.
In a cargo area door location, a full-range driver handles low, mid, and high frequencies independently, which is relevant because no supplemental tweeter or woofer is specified for the same location in these model years.
The 6x8 inch format is one of Ford's commonly used oval sizes and is dimensionally interchangeable in many applications with the 5x7 inch oval format, as both share the same bolt pattern in standard aftermarket fitments.
Mounting a full-range driver in a rear door location means the speaker reproduces ambient and spatial audio content for rear occupants, including mid-bass warmth and treble detail, from a position at approximately door-panel height.