The Chrysler Newport rear location accommodates a 6x9 inch speaker size. Full-range units represent the compatible type for the audio system. These specifications cover the years 1977 to 1980.
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 speaker location in the Chrysler Newport accommodates a 6x9 inch mounting cutout across the 1977 through 1980 model years.
A 6x9 inch speaker is an oval format, and the elongated shape allows the cone surface area to be larger than a comparable round speaker, which supports lower frequency reproduction within a shallow mounting depth.
The oval geometry of a 6x9 inch driver also distributes sound across a wider horizontal plane, which suits a rear deck position where the speaker fires upward and toward the cabin rather than directly at the listener.
Rear deck mounting positions typically involve a flat or slightly angled baffle surface, and the 6x9 inch format is a common fitment for full-size American rear decks of the late 1970s and early 1980s due to the available panel real estate in that era.
A rear deck installation places the speaker at a greater physical distance from front-seat occupants, meaning the location naturally attenuates high-frequency content due to distance and off-axis dispersion before sound reaches the listener.
Full-range is the only compatible speaker type listed for the Chrysler Newport rear location, indicating a single driver is used to reproduce the entire audible frequency spectrum at that position rather than a multi-driver arrangement.
A full-range driver in a 6x9 inch format handles low, mid, and high frequencies from one cone, which is mechanically achieved through a combination of a compliant surround for bass movement and a dust cap or whizzer cone for upper-frequency projection.
Because a full-range driver must reproduce both bass and treble simultaneously, the 6x9 inch cone size contributes meaningful low-midrange and bass output, while the upper frequencies are handled by the same driver without a crossover network.
The rear deck position in a full-size vehicle like the Newport places the speaker beneath the rear window, where reflected sound off the glass can interact with the direct output of the driver, affecting the perceived frequency response in the cabin.