2008 Infiniti M45 Speaker Sizes
The speaker size chart for the 2008 Infiniti M45 provides factory audio system specifications for replacement and aftermarket upgrade purposes. Information covers speaker locations throughout the vehicle, including front door panels, center dash, rear deck lid, rear door panels, and rear deck center positions. Data includes specifications for factory-installed components in each audio system location.
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| 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 |
|
2008 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 factory audio configuration in the 2008 Infiniti M45 dedicates the 1-inch front door panel position to tweeter units, which handle upper frequency reproduction independently from the larger midbass drivers located elsewhere in the same door panel.
- Both center dash and rear deck lid locations accommodate 3.5-inch full-range speakers, suggesting these positions serve as supplementary sound sources to fill spatial gaps in the cabin soundstage rather than primary audio channels.
- The 6.5-inch openings in both front and rear door panels accept either midbass or full-range speaker types, offering flexibility in component system configurations where midbass drivers pair with separate tweeters or in coaxial full-range installations that combine both frequency ranges.
- Replacing the door panel speakers may take priority over other locations since the 6.5-inch front and rear positions typically handle the majority of midrange and vocal frequencies that dominate most listening material.
- The rear deck center position houses an 8-inch subwoofer unit, indicating the 2008 Infiniti M45 includes dedicated low-frequency reinforcement from the factory rather than relying solely on midrange drivers for bass output.
- Component speaker systems that separate tweeters from midbass drivers could utilize the existing 1-inch tweeter location in the front doors while upgrading the 6.5-inch position to a dedicated midbass driver, maintaining the factory mounting architecture.
- Sound quality improvements would likely register most noticeably from upgrades to the 6.5-inch door speakers and 8-inch subwoofer, as these handle the frequency ranges where factory speakers typically show the greatest performance limitations compared to aftermarket alternatives.