The Acura Integra rear deck lid accommodates a 6x9 inch speaker size. Full-range units are the compatible type for audio system replacement in the location. These specifications cover the years 1990 to 2001.
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 Acura Integra rear deck lid is the horizontal panel located at the base of the rear windshield, positioned above the trunk cavity and behind the rear passenger seating area.
Deck lid locations are typically shallow in mounting depth, which affects the physical clearance available for speaker cone excursion and magnet assembly depth.
The 6x9 inch oval format is a non-circular speaker shape with a longer horizontal axis, which allows greater cone surface area than a standard round speaker while fitting within the constrained width of a rear deck panel.
Greater cone surface area in the 6x9 inch format produces stronger low- and mid-frequency output relative to smaller oval or round sizes, which suits the rear deck position where bass reinforcement is a common acoustic role.
The rear deck location places speakers at the rear of the listening environment, angling output upward and forward toward the cabin interior, influencing how sound is reflected off the rear glass before reaching the occupants.
Full-range speakers are designed to reproduce a wide frequency spectrum from a single driver, covering low, mid, and high frequencies without requiring a separate crossover network or additional speaker components.
In the rear deck lid position, a full-range driver handles the entire audible spectrum independently, meaning no supplemental tweeter or woofer is required at that location to achieve broadband reproduction.
The 6x9 inch driver size in a full-range configuration carries sufficient cone mass and surround compliance to reproduce lower midrange and bass frequencies, which are acoustically appropriate for a rear-mounted position distant from the dashboard.
High-frequency reproduction in a full-range 6x9 inch speaker is typically handled by a small whizzer cone or an integrated tweeter dome attached to the main cone, compensating for the reduced high-frequency directivity of a large driver.
The rear deck lid mount places the speaker physically close to the rear occupants and relatively far from front occupants, a spatial relationship that affects the perceived balance of sound across seating positions.