2004 Infiniti FX35 Speaker Sizes
The 2004 Infiniti FX35 factory audio system features center dash, dashboard, and d-pillar locations that accommodate 3.5 inch speakers, while b-pillar and dashboard locations support 4 inch units. Front door panel and rear door panel locations accept 6.5 inch speakers. Full-range, midrange, and midbass units function as compatible speaker types for replacement and upgrade.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| B-Pillar | 4 | Midrange |
|
| Center Dash | 3.5 | Full-Range |
|
| D-Pillar | 3.5 | Midrange |
|
| Dashboard | 3.5 | Full-Range |
|
| Dashboard | 4 | Midrange |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Door Panel | 6.5 | Midbass / Full-Range |
|
2004 Infiniti FX35 Speaker Replacement Summary
7
total positions
2
easy to replace
1
high priority
2
professional only
Replacement difficulty:
Low: 2 Medium: 3 High: 2Replacement priority:
High: 1 Medium: 4 Low: 22004 Infiniti FX35 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 FX35 features multiple speaker locations with varying sizes, suggesting a multi-driver audio system design that distributes different frequency ranges across the cabin.
- Front and rear door panels both accommodate 6.5 inch drivers compatible with either midbass or full-range types, which may indicate these positions handle the primary audio output for occupants.
- Upgrading the door panel speakers could potentially provide the most noticeable sound improvement, as these larger drivers typically reproduce mid and lower frequencies more effectively than smaller units.
- The vehicle includes three distinct 3.5 inch speaker locations - center dash, dashboard, and D-pillar - though these serve different purposes with full-range versus midrange designations.
- B-pillar and dashboard locations both accommodate 4 inch midrange drivers, which suggests these positions focus on reproducing vocal and instrumental frequencies rather than bass response.
- The D-pillar 3.5 inch midrange speakers are positioned toward the rear of the cabin, possibly contributing to soundstage depth or rear passenger audio quality in the 2004 Infiniti FX35.
- Full-range 3.5 inch speakers in the center dash and dashboard locations likely handle treble and upper-midrange frequencies, complementing the larger door-mounted drivers.
- The single DIN radio specification indicates a standard-height head unit opening, which may limit aftermarket stereo options compared to double DIN configurations.
- Replacement speakers would need to match both the physical size and impedance characteristics of the original equipment to function properly with the factory amplifier, if equipped.
- The combination of midrange-specific and full-range speaker designations suggests the factory system was engineered with frequency separation in mind rather than relying solely on full-range drivers throughout.