The Mercedes-Benz 560SEC rear deck lid accommodates a 4x6 inch speaker size across all listed model years. Full-range units represent the compatible audio system type for the location. These specifications cover the years 1986 to 1991.
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 base of the rear window, typically spanning the width of the trunk area beneath the rear glass.
Mounting in the rear deck lid places speakers at the rearmost point of the passenger cabin, projecting sound forward toward occupants from behind the rear seat.
The deck lid location is generally a shallow, panel-mounted installation, with limited depth clearance due to the proximity of the trunk cavity and structural bracing beneath the surface.
A 4x6 inch speaker is an oval or elliptical driver, a format sized to fit mounting cutouts common in factory locations where a round driver would not accommodate the available space.
The 4x6 inch dimensions produce a radiating cone area smaller than a 5.25 inch round driver, which affects low-frequency displacement and limits the depth of bass reproduction relative to larger formats.
In the rear deck lid of the Mercedes-Benz 560SEC, the 4x6 inch footprint aligns with the factory-cut opening dimensions across the 1986 through 1991 model years.
Full-range drivers are single-unit transducers designed to reproduce low, mid, and high frequencies without the assistance of a separate tweeter or woofer.
The full-range type is the sole compatible speaker type for the rear deck lid position across all listed model years, making the location unsuitable for component systems that separate tweeter and woofer mounting.
A full-range driver mounted at the rear deck redirects broadband sound - including midrange vocals and upper-frequency detail - from behind the listener, which affects the perceived soundstage depth within the cabin.
The 4x6 inch format in a rear deck location contributes primarily to midbass and midrange frequencies, with the smaller cone area limiting the driver's ability to reproduce deep low frequencies at high output levels.