1973 Porsche 911 Speaker Sizes
The 1973 Porsche 911 factory audio system includes specific mounting locations. The front door panel accommodates 5.25 inch speakers, and the rear door panel accommodates a 4x6 inch speaker size. Compatible types for an audio replacement upgrade include full-range and midbass units.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 5.25 | Midbass / Full-Range |
|
| Rear Door Panel | 4x6 | Full-Range |
|
1973 Porsche 911 Speaker Replacement Summary
2
total positions
2
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 2 Medium: 0 High: 0Replacement priority:
High: 1 Medium: 1 Low: 01973 Porsche 911 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 1973 Porsche 911 features different speaker openings between front and rear positions, with the front door panels accommodating 5.25 inch units while rear panels accept 4x6 inch configurations.
- Front door panel locations support both midbass drivers and full-range speakers, providing flexibility in system design depending on whether a separate tweeter installation is planned.
- Rear door panel positions are limited to full-range speakers due to the 4x6 inch oval mounting, which typically restricts options to coaxial designs that handle higher frequencies internally.
- Replacing factory speakers in the front positions with dedicated midbass drivers could allow for better low-frequency reproduction if paired with separate high-frequency components.
- The mismatched sizing between front and rear locations may require different speaker models, as manufacturers rarely produce both 5.25 inch round and 4x6 inch oval formats within the same product line.
- Full-range speakers in the 5.25 inch front positions would provide a simpler installation path compared to component systems, though potentially with less staging precision.
- The single DIN radio opening maintains compatibility with numerous aftermarket head units, which could serve as the foundation for improved audio quality beyond speaker replacement alone.
- Prioritizing front speaker replacement over rear units would likely yield greater sonic benefits, as front soundstage typically contributes more to the listening experience in two-door applications.