2009 BMW 750i Speaker Sizes
The 2009 BMW 750i factory audio system contains specific speaker locations. Center dash, front door panel, rear deck lid, and rear door panel accommodate 4 inch speakers, and below seats accepts an 8 inch speaker size. Additionally, center dash, front door panel, rear deck lid, and rear door panel support 1 inch units. Compatible speaker types for replacement and upgrade include tweeters, midranges, 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 |
|
2009 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: 02009 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 2009 BMW 750i factory audio system incorporates a three-way speaker configuration that separates high, mid, and low frequencies across distinct speaker types in multiple locations throughout the cabin.
- Tweeters handling high-frequency reproduction are positioned in four separate locations: the center dash, front door panels, rear deck lid, and rear door panels, all utilizing 1-inch units.
- Midrange speakers responsible for vocal and instrumental clarity occupy the same four locations as the tweeters, though these use 4-inch units instead.
- Low-frequency reproduction falls to an 8-inch subwoofer located below the seats, which handles bass output for the entire audio system.
- The standardized 1-inch tweeter size across all four locations may simplify replacement planning, as the same aftermarket component could potentially work in multiple positions.
- Similarly, the uniform 4-inch midrange specification across all four mounting points suggests that a single aftermarket midrange speaker model might be applicable to multiple locations within the 2009 BMW 750i.
- The three-way component separation indicates that replacing speakers might require attention to frequency-specific units rather than full-range coaxial speakers in most locations.
- Upgrading the 8-inch subwoofer below the seats could enhance bass response without requiring modifications to door or deck lid panels.
- The single DIN radio opening provides a standard-sized slot for aftermarket head unit installation if audio source upgrades are considered alongside speaker replacement.
- Door panel speaker upgrades would involve replacing both the 1-inch tweeter and 4-inch midrange in each front and rear door to maintain the factory's frequency distribution design.