2011 BMW 740i Speaker Sizes
The 2011 BMW 740i factory audio system features center dash, front door panel, rear deck lid, and rear door panel locations that accommodate 1 inch speakers. Center dash, front door panel, rear deck lid, and rear door panel locations accept 4 inch units, while below seats locations support an 8 inch speaker size. Compatible speaker types for a sound system 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 | 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 |
|
2011 BMW 740i 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: 02011 BMW 740i 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 2011 BMW 740i utilizes a component speaker configuration with separate tweeters and midrange drivers distributed across multiple locations, which may provide enhanced sound staging compared to coaxial designs.
- Tweeters measuring 1 inch are installed in four locations: center dash, front door panels, rear deck lid, and rear door panels, suggesting a factory audio system designed for broad high-frequency dispersion.
- Midrange drivers at 4 inches occupy corresponding positions to the tweeters, potentially creating a matched frequency response pattern throughout the cabin.
- An 8 inch subwoofer positioned below the seats handles low-frequency reproduction, though this under-seat placement may limit bass output compared to larger enclosures.
- Replacement of the midrange drivers could yield noticeable sound quality improvements, as these handle the critical vocal and instrumental frequency range.
- The factory single DIN radio configuration may constrain aftermarket head unit options compared to double DIN openings found in some vehicles.
- Upgrading the 1 inch tweeters might enhance clarity in the upper frequency spectrum, particularly for cymbal and string instrument reproduction.
- The symmetrical speaker layout between front and rear locations suggests the factory system was engineered to provide consistent audio coverage for all seating positions.
- Aftermarket subwoofer upgrades would need to accommodate the below-seat mounting location and 8 inch size constraint unless alternative installation positions are considered.
- Component speaker replacements would likely require matching sensitivity ratings to maintain proper balance between the tweeter and midrange elements without external crossover modifications.