1987 BMW 735i Speaker Sizes
The 1987 BMW 735i speaker size chart provides factory specifications for replacement audio components. Information covers speaker locations in front kick panel and rear deck lid positions. Details support aftermarket upgrade planning by documenting OEM system configurations and installation specifications for audio enhancement projects.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Front Kick Panel | 4x6 | Full-Range |
|
| Rear Deck Lid | 5.25 | Midbass / Full-Range |
|
1987 BMW 735i 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: 01987 BMW 735i 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 1987 BMW 735i front kick panel speakers measure 4x6 inches and accept full-range speaker types, while the rear deck lid positions accommodate 5.25-inch speakers compatible with either midbass or full-range configurations.
- Replacement speakers for the kick panel locations would need to match the 4x6 form factor, which represents a less common oval speaker configuration compared to standard round or square formats.
- The rear deck lid positions offer flexibility in speaker selection, as the 5.25-inch openings can accommodate dedicated midbass drivers for enhanced low-frequency response or full-range speakers for broader frequency coverage.
- Full-range speakers in the front kick panel positions would handle the entire frequency spectrum from a single driver, potentially simplifying the audio system design without requiring separate tweeters.
- Midbass-specific speakers in the 5.25-inch rear positions could reproduce lower frequencies with greater authority than full-range alternatives, though they would typically require additional high-frequency drivers elsewhere in the system.
- The kick panel mounting locations may benefit from the proximity to the vehicle floor for improved bass coupling, though the 4x6 format presents size constraints for low-frequency reproduction.
- Choosing full-range speakers for both front and rear positions would create a simpler two-way system architecture without the need for external crossovers or component separation.
- The 5.25-inch size in the rear deck represents a moderate speaker diameter that balances cone area for bass output against packaging constraints in the deck lid space.