1979 BMW 733i Speaker Sizes
The 1979 BMW 733i factory audio system features specific location allocations where the front kick panel accommodates a 4x6 inch speaker size. Furthermore, the rear deck lid supports 5.25 inch units. Compatible speaker types for a replacement upgrade consist of full-range and midbass units.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Front Kick Panel | 4x6 | Full-Range |
|
| Rear Deck Lid | 5.25 | Midbass / Full-Range |
|
1979 BMW 733i Speaker Replacement Summary
2
total positions
1
easy to replace
0
high priority
0
professional only
Replacement difficulty:
Low: 1 Medium: 1 High: 0Replacement priority:
High: 0 Medium: 2 Low: 01979 BMW 733i 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 front kick panel positions in the 1979 BMW 733i utilize 4x6 inch full-range speakers, which typically serve as the primary sound source in the lower dashboard area where factory speaker locations were originally designed.
- Rear deck lid locations accept 5.25 inch speakers with compatibility for both midbass and full-range configurations, providing flexibility in system design depending on whether a component or coaxial approach is preferred.
- Full-range speakers in the kick panel locations would handle the complete frequency spectrum from a single driver, while the rear deck positions could accommodate either dedicated midbass drivers for lower frequencies or additional full-range units for broader coverage.
- The single DIN radio opening follows period-standard head unit sizing, which may influence amplifier integration and crossover options when planning speaker replacements.
- Prioritizing the front kick panel speakers might yield more noticeable improvements in vocal clarity and stereo imaging since these positions sit closer to occupant ear level compared to rear deck mounting.
- Component speaker systems could theoretically place tweeters elsewhere while using the rear deck location for midbass duties, though the 1979 BMW 733i front full-range configuration suggests a more straightforward coaxial upgrade path.
- The 5.25 inch rear specification allows for drivers with sufficient cone area to reproduce midrange frequencies adequately, particularly when configured as full-range rather than strictly midbass.
- Power handling and sensitivity ratings become relevant considerations given the likely modest output from period-appropriate or replacement head units connected to these speaker positions.