2008 BMW 750i Speaker Sizes
The 2008 BMW 750i factory audio system contains specific locations designed for various audio components. Center dash, front door panel, rear deck lid, and rear door panel accommodate 4 inch speakers, while front door panel and rear deck lid also accept 0.75 inch speakers, and spaces below seats accommodate an 8 inch speaker size. Compatible speaker types for a replacement and upgrade include tweeter, midrange, and subwoofer units.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Below Seats | 8 | Subwoofer |
|
| Center Dash | 4 | Midrange |
|
| Front Door Panel | 0.75 | Tweeter |
|
| Front Door Panel | 4 | Midrange |
|
| Rear Deck Lid | 0.75 | Tweeter |
|
| Rear Deck Lid | 4 | Midrange |
|
| Rear Door Panel | 4 | Midrange |
|
2008 BMW 750i Speaker Replacement Summary
7
total positions
5
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 5 Medium: 2 High: 0Replacement priority:
High: 2 Medium: 5 Low: 02008 BMW 750i 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 2008 BMW 750i audio system incorporates a distributed speaker configuration with tweeters, midrange drivers, and a dedicated subwoofer location, suggesting a factory setup designed for multi-way sound reproduction across different frequency ranges.
- Tweeter placement in both front door panels and rear deck lid positions at 0.75 inch may contribute to high-frequency dispersion throughout the cabin, though aftermarket replacement could potentially refine upper-range clarity and detail.
- Multiple 4-inch midrange locations across center dash, front doors, rear deck lid, and rear door panels indicate a focus on vocal and instrumental frequency coverage, with replacement speakers in these positions potentially offering improved tonal accuracy.
- The 8-inch subwoofer location below the seats represents a space-conserving approach to low-frequency reinforcement, though this mounting position may limit bass output compared to trunk-mounted alternatives due to reduced enclosure volume.
- Upgrading the midrange drivers might yield noticeable improvements in sound quality since these speakers handle the majority of audible frequencies where human hearing is most sensitive.
- The single DIN radio opening provides standard aftermarket head unit compatibility, though integration with factory amplification and speaker configuration may require additional adapters or signal processors.
- Component speaker systems with separate tweeters and midrange drivers could work well with this configuration, as dedicated tweeter locations already exist separate from the midrange positions.
- The under-seat subwoofer position may benefit from a shallow-mount replacement design to maximize available depth while maintaining adequate excursion capability for bass response.