2005 Infiniti Q45 Speaker Sizes
The 2005 Infiniti Q45 factory audio system locations include the dashboard, which accommodates a 1 inch speaker size, and the front door panel, which supports 6.5 inch units. Additionally, the rear deck lid accommodates 6.5 inch units and accepts an 8 inch unit. Compatible speaker types for a replacement or upgrade consist of tweeters, midbass, full-range, and woofers.
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 | 8 | Woofer |
|
| Rear Deck Lid | 6.5 | Midbass / Full-Range |
|
2005 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: 02005 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 2005 Infiniti Q45 features a multi-location speaker system with five distinct mounting positions, suggesting a factory configuration that separates frequency reproduction across different driver types rather than relying solely on full-range speakers throughout the cabin.
- Dashboard-mounted tweeters at 1 inch may handle high-frequency reproduction separately from the larger drivers, indicating a factory design that attempted to distribute sound staging across the front soundstage rather than concentrating all frequencies at door level.
- Both front door panels and rear deck positions accommodate 6.5-inch drivers compatible with midbass or full-range speaker types, which could allow flexibility in choosing between component system expansion or simpler coaxial replacements depending on the desired level of audio performance.
- The presence of dedicated 8-inch woofer positions in the rear deck lid suggests the 2005 Infiniti Q45 factory system may have included low-frequency reinforcement separate from the 6.5-inch rear deck drivers, potentially creating a four-way or five-way speaker arrangement in the original configuration.
- Aftermarket component speaker systems might utilize the existing tweeter locations in the dashboard while upgrading the 6.5-inch front door positions with higher-quality midbass drivers, potentially maintaining the factory's frequency separation philosophy while improving overall sound quality.
- The single DIN radio opening could limit head unit upgrade options compared to double DIN configurations, though single DIN aftermarket receivers still offer substantial improvements in amplification and signal processing over factory units from this era.
- Replacing the rear 8-inch woofers might provide noticeable low-frequency improvement without requiring subwoofer installation, particularly if the factory drivers have deteriorated or if higher-sensitivity aftermarket woofers are selected to better match upgraded front speakers.