The Acura ILX dashboard accommodates a 3 inch speaker size across all listed model years. Full-range units are the compatible types for the audio system. These specifications cover the 2013 to 2017 model years.
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 dashboard of the Acura ILX accommodates a 3-inch speaker opening across the 2013 through 2017 model years.
A 3-inch driver in a dashboard position operates primarily in the upper midrange and high-frequency bands, which suits the forward-facing, near-listener placement typical of dashboard installations.
The dashboard location places speakers close to the listener's ear level relative to the windshield plane, which reduces the distance sound must travel before reaching the occupants and affects perceived imaging and treble clarity.
Dashboard installations are generally constrained in mounting depth due to the shallow cavity between the dashboard skin and the structural components beneath, making the 3-inch diameter relevant not only to the baffle opening but also to the limited available enclosure volume.
The 3-inch diameter limits low-frequency cone area, meaning bass reproduction at the dashboard position is physically restricted by driver size, and the usable frequency range is weighted toward the midrange and above.
Full-range drivers are designed to reproduce the entire audible frequency spectrum from a single cone, which in a 3-inch format means the driver is handling treble, midrange, and limited bass extension without the support of a crossover network.
In the dashboard position, a full-range 3-inch driver handles frequencies where directional hearing sensitivity is highest, meaning placement and angle of the speaker face relative to the occupant have a measurable effect on perceived sound localization.
The sole compatible type listed for the Acura ILX dashboard across all covered model years is full-range, indicating no provision for component tweeters or midrange-only drivers within the specifications for the dashboard location.