The Infiniti M45 rear deck center accommodates an 8 inch speaker size across all listed model years. The compatible audio type for the location is a subwoofer replacement, making the system suited for low-frequency reproduction. The specifications chart covers the 2006 to 2010 range of model years.
A large driver for the lowest bass notes, typically from about 20 Hz to 120 Hz. It is usually installed in a separate enclosure and works alongside the other speakers.
Additional Notes
The rear deck center position in the Infiniti M45 is a dedicated single-speaker location situated along the rear shelf of the cabin, between the rear seats and the back window.
A center mounting point on the rear deck places the speaker in a symmetrical axis relative to the cabin width, which is a common placement for low-frequency reproduction that benefits less from precise stereo positioning.
The rear deck surface typically sits above the trunk cavity, and in many sedans the deck panel is acoustically coupled to the trunk volume below, which can function as an enclosure that reinforces bass output for a subwoofer installed at that location.
An 8-inch driver occupies a mid-range cone diameter among subwoofer sizes, capable of reproducing low-frequency content generally spanning from around 20 Hz to 200 Hz, with greater excursion potential than smaller drivers but more compact dimensions than 10-inch or 12-inch alternatives.
At 8 inches, the driver cone area is large enough to move sufficient air volume for perceivable bass reproduction within a passenger cabin, where the enclosed space naturally pressurizes at low frequencies and amplifies the perceived output.
A subwoofer is a driver type designed specifically for low-frequency reproduction, typically crossing over below 80 Hz to 120 Hz, and unlike full-range or coaxial speakers, subwoofers are not intended to handle midrange or high-frequency content.
Because subwoofers are largely non-directional at the frequencies in their operating range, placement at the rear deck center does not significantly compromise stereo imaging for the low-frequency content the driver handles.
The Infiniti M45 rear deck center location accommodates an 8-inch subwoofer across the 2006 through 2010 model years, establishing a consistent mounting diameter requirement for all listed vehicles in the specification.
Rear deck installations require drivers with a mounting depth compatible with the clearance between the deck panel surface and any structural or trunk lid components below, making the physical depth specification of any replacement subwoofer a relevant mechanical consideration for this location.
The center position on the rear deck, as distinct from left or right rear deck speaker locations, is a single-channel mounting point, meaning any subwoofer placed there reproduces a mono low-frequency signal rather than a stereo channel.