2004 Infiniti Q45 Speaker Sizes
The 2004 Infiniti Q45 factory audio system features dashboard locations that accommodate a 1 inch speaker size, while front door panel and rear deck lid locations accept 6.5 inch units. Compatible speaker types for a system replacement and upgrade include tweeter, midbass, and full-range.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 1 | Tweeter |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Deck Lid | 6.5 | Midbass / Full-Range |
|
2004 Infiniti Q45 Speaker Replacement Summary
3
total positions
2
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 2 Medium: 1 High: 0Replacement priority:
High: 1 Medium: 2 Low: 02004 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 2004 Infiniti Q45 features a factory audio system with three distinct speaker locations, each serving different frequency reproduction roles within the overall soundstage.
- Dashboard tweeters at 1 inch handle high-frequency reproduction, typically covering the upper range of the audible spectrum where vocals and instrumental detail reside.
- Front door panels accommodate 6.5-inch speakers that can accept either midbass drivers for dedicated mid-low frequency handling or full-range speakers capable of reproducing a broader frequency spectrum.
- Rear deck lid speakers mirror the front door specification at 6.5 inches, offering the same midbass or full-range compatibility for rear soundstage fill.
- Replacement of the front door speakers tends to yield the most noticeable audio improvement, as these locations typically handle the majority of the frequency range that listeners perceive most directly.
- Midbass-specific drivers in the 6.5-inch locations would require the dashboard tweeters to remain functional or be upgraded, as this configuration relies on frequency division between components.
- Full-range speakers in the door and deck locations could theoretically operate independently of the tweeters, though this might result in overlapping frequency coverage in the treble region.
- The single DIN radio opening allows for aftermarket head unit installation without requiring dash modification or additional mounting hardware beyond standard single DIN kits.
- Component speaker systems with separate woofers and tweeters could integrate with the existing tweeter locations, potentially utilizing the factory mounting points for the high-frequency drivers.
- Power handling and sensitivity specifications would need consideration when selecting aftermarket speakers, as factory amplification may have been calibrated for original equipment impedance and efficiency characteristics.