1991 BMW 850i Speaker Sizes
The 1991 BMW 850i speaker size chart provides factory speaker specifications and locations for original audio system components. Information covers replacement speaker positions in the a-pillar, front kick panel, and rear deck lid areas. Aftermarket upgrade options are detailed for each mounting location within the audio system.
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| Location | Size | Type | Notes |
|---|---|---|---|
| A-Pillar | 2 | Tweeter |
|
| Front Kick Panel | 5.25 | Midbass |
|
| Rear Deck Lid | 5.25 | Midbass / Full-Range |
|
1991 BMW 850i Speaker Replacement Summary
3
total positions
1
easy to replace
0
high priority
1
professional only
Replacement difficulty:
Low: 1 Medium: 1 High: 1Replacement priority:
High: 0 Medium: 2 Low: 11991 BMW 850i 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 1991 BMW 850i features a three-location speaker system with A-pillar tweeters and both front and rear 5.25 inch positions, suggesting a factory configuration that may have separated high and mid-range frequencies across distinct mounting points.
- Tweeter placement in the A-pillars typically indicates an emphasis on stereo imaging and soundstage width, as this location projects high frequencies more directly toward occupants compared to door or dash mounting.
- The front kick panel location accommodates 5.25 inch midbass drivers, which could provide lower frequency response when positioned close to the vehicle floor where boundary reinforcement may enhance bass output.
- Rear deck lid speakers in the 1991 BMW 850i accept either midbass or full-range 5.25 inch units, offering flexibility depending on whether the system relies on separate tweeters or requires rear speakers to reproduce a broader frequency spectrum.
- Replacing kick panel speakers might take priority if bass response has degraded, as these midbass drivers often handle the majority of mid-to-low frequency reproduction in component systems.
- Component speaker sets with separate tweeters and woofers would align with the existing A-pillar and kick panel configuration, potentially requiring less modification than switching to coaxial designs.
- The single DIN radio opening follows period-standard head unit sizing, which may limit integration of larger touchscreen systems without additional mounting adapters or dash modifications.
- Sound improvement from speaker replacement could depend significantly on maintaining proper crossover settings between the A-pillar tweeters and the larger drivers, as mismatched components may create frequency gaps or overlap.
- The 5.25 inch sizing in both front and rear positions suggests standardization that may simplify replacement sourcing, though depth and mounting requirements would still need verification for specific aftermarket models.