1981 BMW 320i Speaker Sizes
The 1981 BMW 320i factory audio system features specific locations for 5.25 inch speakers. Front kick panel and front door panel locations accommodate 5.25 inch units. Rear deck lid and rear door panel locations accept a 5.25 inch speaker size. Compatible speaker types for replacement and upgrade include midbass and full-range 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 |
|
1981 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: 01981 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 1981 BMW 320i utilizes a uniform 5.25 inch speaker size across all factory locations, which may simplify the selection process when considering aftermarket replacements for multiple positions simultaneously.
- Front kick panel positions are designated for midbass drivers only, suggesting these locations may be optimized for lower frequency reproduction rather than full-range output due to spatial or acoustic constraints in that area.
- Door panel and rear deck lid locations in the 1981 BMW 320i accept either midbass or full-range speaker types, potentially offering flexibility in system configuration depending on whether a dedicated tweeter setup is planned or if full-range units are preferred.
- Midbass-capable speakers across all four locations could allow for a component system design where separate tweeters handle higher frequencies while the 5.25 inch drivers focus on midrange and lower frequency content.
- Full-range speakers installed in the door and rear positions might provide a simpler upgrade path without requiring additional crossovers or tweeter mounting solutions, though this approach typically involves compromises in high-frequency extension compared to component configurations.
- The single DIN radio opening follows period-appropriate head unit standards, which may limit integration options compared to double DIN configurations but maintains compatibility with numerous aftermarket receivers designed for this form factor.