2009 Infiniti M45 Speaker Sizes
The 2009 Infiniti M45 factory audio system features specific locations for various units, where the center dash and rear deck lid accommodate 3.5 inch speakers, the front door panel and rear door panel support 6.5 inch units, and the rear deck center accepts an 8 inch speaker size. Additionally, the front door panel accommodates a 1 inch tweeter. Compatible speaker types for system replacement or upgrade consist of tweeters, full-range drivers, midbass units, and subwoofers.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Center Dash | 3.5 | Full-Range |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Deck Center | 8 | Subwoofer |
|
| Rear Deck Lid | 3.5 | Full-Range |
|
| Rear Door Panel | 6.5 | Midbass / Full-Range |
|
2009 Infiniti M45 Speaker Replacement Summary
6
total positions
4
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 4 Medium: 2 High: 0Replacement priority:
High: 2 Medium: 4 Low: 0Additional Notes
- The 2009 Infiniti M45 features a multi-location speaker configuration with six distinct mounting positions distributed throughout the cabin, suggesting a factory audio design that prioritizes spatial sound coverage.
- Front door panels accommodate both 1-inch tweeters and 6.5-inch midbass or full-range drivers, indicating a two-way component setup that separates high-frequency reproduction from mid-range and bass output.
- Rear door panels utilize 6.5-inch speakers compatible with either midbass or full-range drivers, providing flexibility in system configuration depending on whether dedicated tweeters are incorporated elsewhere.
- The center dash position houses a 3.5-inch full-range driver, which typically handles mid-range frequencies and can contribute to center-stage vocal clarity when properly integrated with the broader system.
- Rear deck lid speakers also measure 3.5 inches and accept full-range drivers, potentially supplementing rear fill or ambient sound within the listening environment.
- An 8-inch subwoofer location exists in the rear deck center, providing dedicated low-frequency reinforcement that may benefit from upgraded components if deeper bass extension is desired.
- Tweeter placement in the front door panels at 1-inch suggests high-frequency directionality can be optimized through aiming or angling during replacement installations.
- The presence of both 3.5-inch and 6.5-inch locations indicates a stratified approach to frequency distribution, where smaller drivers handle specific ranges while larger units manage broader bandwidth or lower frequencies.
- Replacement priority would likely focus on the 6.5-inch front door components and the 8-inch subwoofer, as these positions handle the majority of audible frequency content and bass foundation.
- Component speaker systems designed for the front stage could leverage the separate 1-inch tweeter mounts alongside the 6.5-inch midbass locations for improved sonic staging and frequency separation.