1977 BMW 320i Speaker Sizes
The 1977 BMW 320i factory audio system contains several locations, where front kick panel locations accept a 5.25 inch speaker size, while front door panel, rear deck lid, and rear door panel locations accommodate 5.25 inch units. Compatible speaker types for a replacement upgrade include midbass and full-range audio 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 |
|
| Front Kick Panel | 5.25 | Midbass |
|
| Rear Deck Lid | 5.25 | Midbass / Full-Range |
|
| Rear Door Panel | 5.25 | Midbass / Full-Range |
|
1977 BMW 320i 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: 01977 BMW 320i 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 1977 BMW 320i uses a uniform 5.25 inch speaker size across all four locations, which may simplify the replacement process when upgrading the audio system.
- Front kick panel speakers are designated specifically for midbass applications, suggesting these positions handle mid-to-low frequency reproduction in the factory configuration.
- Door panel and rear deck lid locations accept either midbass or full-range speaker types, providing flexibility in component selection based on the desired sound characteristics.
- Full-range speakers in the door and rear positions could handle broader frequency ranges without requiring separate tweeters, though midbass options might integrate better with an aftermarket component system.
- The single DIN radio opening indicates a standard head unit mounting size, which supports compatibility with many aftermarket receivers when updating the source equipment.
- Upgrading speakers in the kick panels first might yield noticeable improvements in lower frequency response, as these locations often benefit from dedicated midbass drivers positioned closer to the listener.
- A component speaker system with separate tweeters could utilize the midbass-designated positions while adding high-frequency drivers in custom locations for enhanced soundstage.
- The consistent 5.25 inch sizing across all locations allows for matched speaker sets throughout the cabin, potentially creating more uniform tonal balance.