2009 Infiniti G37 Speaker Sizes
The 2009 Infiniti G37 factory audio system integrates multiple locations for sound reproduction. Front door panels and rear door panels accept 6.5 inch units, 6.75 inch units, 3.5 inch units, and a 1 inch speaker size, while rear door panels additionally support 3.5 inch units. Rear side panels accommodate 3.5 inch units, center dash accepts a 4 inch unit, and rear deck lids support 5.25 inch units alongside 6x9 inch units. Compatible speaker types for audio replacement and upgrade projects include tweeters, midranges, midbass, and full-range units.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Center Dash | 4 | Midrange |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Front Door Panel | 3.5 | Midrange |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 6.75 | Midbass / Full-Range |
|
| Rear Deck Lid | 6x9 | Full-Range |
|
| Rear Deck Lid | 5.25 | Midbass / Full-Range |
|
| Rear Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Door Panel | 3.5 | Midrange |
|
| Rear Side Panel | 3.5 | Midrange |
|
2009 Infiniti G37 Speaker Replacement Summary
10
total positions
8
easy to replace
4
high priority
0
professional only
Replacement difficulty:
Low: 8 Medium: 2 High: 0Replacement priority:
High: 4 Medium: 5 Low: 12009 Infiniti G37 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 2009 Infiniti G37 contains a distributed speaker system with multiple sizes across different locations, suggesting a factory audio design that separates frequency ranges among various drivers rather than concentrating output through fewer full-range units.
- Replacement priorities would likely focus on the 6.5 inch and 6.75 inch midbass or full-range speakers in the front door panels, as these larger drivers typically handle the majority of audible frequency content and contribute substantially to overall sound quality in most listening positions.
- The presence of dedicated 1 inch tweeters in the front door panels indicates a component speaker arrangement up front, which may produce better stereo imaging than coaxial designs since the high-frequency drivers can be positioned separately from the midbass units.
- Multiple 3.5 inch midrange speakers populate the front door panels, rear door panels, and rear side panels, potentially filling in the vocal and upper midrange frequencies that fall between the tweeter and larger midbass drivers.
- A 4 inch midrange speaker in the center dash position could provide focused vocal reproduction toward the windshield area, though its contribution to the overall soundstage would depend on factory amplification and crossover settings.
- The rear deck lid accommodates both 5.25 inch and 6x9 inch speakers, offering flexibility for replacement options depending on whether an installer prefers round or oval drivers for rear fill or additional bass reinforcement.
- Upgrading the 6.5 inch rear door panel speakers alongside the front components could create a more balanced sound field throughout the cabin, though this would depend on listening preferences and whether rear passengers are a consideration.
- The radio supports both single DIN and double DIN head units, allowing for aftermarket receiver installations that range from basic compact models to larger touchscreen units with advanced connectivity features.
- Component speaker systems designed for the front doors would need to include separate tweeters, midrange drivers, and midbass units to fully utilize the existing mounting locations and potentially improve upon the factory frequency separation.
- The variety of speaker sizes and types throughout the vehicle suggests that sound improvement might come from selective upgrades rather than replacing every driver, particularly if budget constraints exist or if certain factory speakers already perform adequately.