2018 BMW 750i Speaker Sizes
The 2018 BMW 750i factory audio system contains specific speaker mounting locations throughout the interior cabin. Center dash, front door panel, rear door panel, and rear deck lid locations accommodate 1 inch speakers, as well as 4 inch units, while locations below seats accept an 8 inch speaker size. Compatible speaker types for a sound system replacement and system upgrade include tweeters, midrange units, and subwoofers.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Below Seats | 8 | Subwoofer |
|
| Center Dash | 1 | Tweeter |
|
| Center Dash | 4 | Midrange |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 4 | Midrange |
|
| Rear Deck Lid | 1 | Tweeter |
|
| Rear Deck Lid | 4 | Midrange |
|
| Rear Door Panel | 1 | Tweeter |
|
| Rear Door Panel | 4 | Midrange |
|
2018 BMW 750i Speaker Replacement Summary
9
total positions
6
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 6 Medium: 3 High: 0Replacement priority:
High: 2 Medium: 7 Low: 0Additional Notes
- The 2018 BMW 750i audio system utilizes a component speaker configuration with dedicated tweeters, midrange drivers, and subwoofers distributed across multiple locations throughout the cabin.
- Tweeters measuring 1 inch are installed in four distinct positions: the center dash, both front door panels, rear deck lid, and rear door panels, suggesting a focus on high-frequency dispersion.
- Midrange drivers at 4 inches occupy the same four locations as the tweeters, indicating a component system design where frequency ranges are separated rather than combined in coaxial speakers.
- An 8-inch subwoofer positioned below the seats handles low-frequency reproduction, which may provide bass response without consuming trunk space.
- Replacement of the midrange speakers could potentially yield noticeable improvements in vocal clarity and instrumental detail, as these drivers handle the most prominent audible frequencies.
- The tweeter locations in both front and rear doors, combined with center dash and rear deck positions, suggest an attempt at creating a balanced soundstage for all seating positions.
- Component speaker replacements would require matching 1-inch tweeters and 4-inch midrange units, along with appropriate crossovers to maintain proper frequency division between drivers.
- The under-seat subwoofer location may present access challenges during replacement but offers acoustic benefits by coupling with the seat structure for enhanced low-frequency output.