The Chrysler Fifth Avenue rear deck lid accommodates a 6x9 inch speaker size across all listed model years. Full-range units are the compatible type for the audio system in the rear deck lid location. The specifications cover the years 1983 to 1989.
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 of the Chrysler Fifth Avenue is the horizontal shelf positioned between the rear seat and the back window, a location that places speakers in an elevated, rearward-facing plane relative to the cabin occupants.
Mounting at the rear deck lid positions speakers at a distance from front occupants, which acoustically favors larger driver sizes capable of projecting sound forward across the length of the cabin.
The 6x9 inch oval footprint is among the largest standard automotive speaker dimensions, and the elongated oval shape allows a greater cone surface area than a circular driver of comparable width, which supports stronger low-frequency output from a shallow deck-lid cavity.
The physical depth of a 6x9 inch driver is a relevant factor at the rear deck lid, as the space beneath the deck panel above the trunk is limited and must accommodate the magnet and basket of the speaker without interference from trunk structural components.
A full-range speaker is a single driver designed to reproduce the entire audible frequency spectrum, from low bass through high treble, within one unit, making external crossover hardware unnecessary for the Chrysler Fifth Avenue rear deck lid installation.
Full-range drivers in a rear deck position handle bass frequencies that benefit from the larger cone area of the 6x9 inch size, as low frequencies require greater air displacement to reach audible levels in an automotive cabin.
The rear deck lid location couples speaker output with the trunk cavity beneath, which can act as an unintended enclosure, and the acoustic interaction between the trunk volume and a full-range 6x9 inch driver affects the perceived bass response in the cabin.
Full-range speakers at the rear deck reproduce high-frequency content from a rearward position, meaning treble and upper midrange energy reaches front occupants after traveling the full length of the passenger cabin, which can affect the directional perception of sound.
The Chrysler Fifth Avenue rear deck lid speaker specification of 6x9 inch full-range applies consistently across the 1983 through 1989 model years, indicating a stable mounting cutout and cavity dimension throughout the production run of the vehicle.