2003 Infiniti Q45 Speaker Sizes
The 2003 Infiniti Q45 speaker size chart provides factory audio system specifications for replacement or aftermarket upgrade purposes. Information includes speaker locations and sizes for dashboard, front door panel, rear door panel, and rear deck lid positions. Details help when selecting compatible aftermarket speakers to replace original factory components in the audio system.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 1 | Tweeter |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Deck Lid | 6.5 | Midbass / Full-Range |
|
| Rear Door Panel | 5.25 | Midbass / Full-Range |
|
2003 Infiniti Q45 Speaker Replacement Summary
4
total positions
3
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 3 Medium: 1 High: 0Replacement priority:
High: 1 Medium: 3 Low: 02003 Infiniti Q45 Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN | 7"×2" | 180×50 | Standard size for basic car radios with small display or no display |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 2003 Infiniti Q45 incorporates a factory tweeter position within the dashboard at 1 inch, which typically handles upper frequency reproduction in the stock audio configuration.
- Front door panels accommodate 6.5 inch speakers that accept either midbass or full-range drivers, offering flexibility in component system design or direct full-range replacement approaches.
- Rear locations feature two distinct mounting sizes, with 5.25 inch openings in the door panels and 6.5 inch positions in the rear deck lid, both accepting midbass or full-range speaker types.
- Component speaker systems might utilize the existing 1 inch dashboard locations for tweeter placement while installing midbass drivers in the larger door and deck positions to create a more expansive soundstage.
- The rear deck lid positions at 6.5 inches match the front door capacity, potentially allowing for consistent speaker selection across front and rear locations if uniform tonal characteristics are desired.
- Full-range speakers in the 5.25 inch and 6.5 inch positions would handle broader frequency ranges independently, while midbass drivers would typically pair with separate tweeters in a component configuration.
- The single DIN radio opening provides standard aftermarket head unit compatibility without requiring modification to the factory dash structure.
- Rear door panel speakers at 5.25 inches represent the smallest full-range position in the vehicle, which may influence output capability compared to the larger 6.5 inch locations in terms of bass response and overall volume.