1977 BMW 320i Speaker Sizes
The 1977 BMW 320i speaker size chart provides factory audio system specifications for replacement or aftermarket upgrade purposes. Available locations include front door panels, front kick panels, rear deck lid, and rear door panels. Information covers speaker specifications for each installation position within the vehicle's audio system.
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| 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.