The Ford Five Hundred rear deck lid accommodates a 6x9 inch speaker size, consistent across all available model years. Full-range units represent the compatible audio system types for the rear deck lid location. These specifications cover the 2005 to 2007 model year replacement chart 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 deck lid is a horizontal surface positioned at the top of the trunk compartment, behind the rear seating area. Speakers mounted in a rear deck lid typically fire upward toward the headliner or rear window, projecting sound forward into the cabin.
A 6x9 inch speaker is an oval format with a larger cone surface area than standard round speakers, which increases low-frequency displacement and allows for greater bass output without requiring a subwoofer enclosure.
The elongated oval shape of a 6x9 inch driver also supports a wider frequency response compared to smaller round formats, making the driver capable of handling both midrange and low-end frequencies within a single unit.
The rear deck lid mounting position in the Ford Five Hundred places 6x9 inch drivers at a physical distance from the front listening position, which affects the spatial balance of sound and the perceived stereo imaging for rear-seat and front-seat passengers.
Full-range speakers are designed to reproduce the entire audible frequency spectrum - typically from approximately 50 Hz to 20,000 Hz - within a single driver, without requiring an external crossover network to divide frequencies between separate components.
In a rear deck lid location, a full-range driver handles low, mid, and high frequencies simultaneously, which is relevant given the absence of a dedicated subwoofer or tweeter mount in the same position.
The combination of a 6x9 inch cone size with a full-range type means the driver mounted in the Ford Five Hundred rear deck lid is responsible for reproducing the full audio spectrum at the rear of the cabin, relying on cone area for low-frequency performance and the tweeter element within the driver for high-frequency extension.
The rear deck lid location is subject to resonance from the trunk cavity below, which can affect low-frequency reproduction depending on how the deck panel is dampened and sealed around the speaker cutout.