The Infiniti M56 rear deck lid accommodates a 3 inch speaker size across all listed model years. Compatible types for the location include full-range audio units. These specifications cover the 2011 to 2013 system range.
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 Infiniti M56 is a surface-mounted location positioned along the rear shelf, behind the rear seating and below the rear windshield, an area acoustically suited to speakers that project sound forward into the cabin.
A 3-inch speaker diameter places the driver in the small-format category, where the reduced cone surface area corresponds to limited low-frequency excursion but efficient reproduction of upper-midrange and high-frequency content.
In a rear deck lid position, a 3-inch driver operates within a constrained enclosure depth, as the structural panel of the deck lid limits available mounting depth compared to door or pillar locations.
Full-range drivers are single-unit speakers designed to reproduce a broad portion of the audible frequency spectrum without crossover components, covering midrange frequencies as the primary output range while extending toward both higher treble and modest bass frequencies.
At 3 inches, a full-range driver in the Infiniti M56 rear deck lid is mechanically suited to the spatial constraints of the location, where larger cone diameters would conflict with panel clearance and structural supports.
The rear deck lid location creates a specific acoustic environment in which sound radiates upward and forward toward the rear passenger area, a projection path that benefits from the broader high-frequency dispersion characteristic of smaller full-range drivers.
Full-range compatibility in the rear deck lid context indicates the speaker operates without requiring an external passive crossover network, functioning as a standalone driver within the panel mount.
The 3-inch Infiniti M56 rear deck lid specification, consistent across 2011, 2012, and 2013 model years, reflects a fixed mounting cutout size that determines the maximum outer frame diameter a compatible speaker can have.