1999 Infiniti Q45 Speaker Sizes
The 1999 Infiniti Q45 factory audio system features a dashboard that accommodates a 1 inch speaker size, while front door panels accept 6.5 inch speakers, and rear deck lids support 5.25 inch units. Compatible audio components for system replacement and upgrade applications include tweeters, midbass units, and full-range units.
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 | 5.25 | Midbass / Full-Range |
|
1999 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: 01999 Infiniti Q45 Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN or Double DIN | 7"×2" or 7"×4" | 180×50 or 180×100 | Vehicle supports both radio sizes |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 1999 Infiniti Q45 features a three-location speaker configuration with varying sizes suited to different frequency ranges, suggesting a factory audio design that separates high-frequency reproduction from mid and lower frequencies.
- Dashboard tweeters at 1 inch handle high-frequency output exclusively, while the larger 6.5 inch front door and 5.25 inch rear deck locations accommodate either midbass or full-range drivers depending on upgrade approach.
- Front door panels typically receive replacement priority in audio upgrades due to their proximity to listeners and ability to support larger 6.5 inch drivers capable of more substantial mid-range and bass response compared to rear deck locations.
- The dual-size midbass option between front and rear locations allows for either a matched full-range approach or a component system where front doors handle primary midrange duties while rear deck speakers provide fill or ambient sound.
- Single DIN and double DIN radio compatibility provides flexibility for head unit upgrades, with double DIN openings accommodating touchscreen interfaces and advanced signal processing that can optimize output to the existing speaker locations.
- Midbass-specific drivers in the 6.5 inch front position may pair effectively with the dedicated dashboard tweeters for a component-style setup, potentially improving staging and frequency separation over factory full-range speakers.
- The smaller 5.25 inch rear deck specification limits low-frequency extension compared to front doors, though this size often proves sufficient for maintaining rear fill in systems where front speakers carry primary listening responsibility.