2015 BMW 740i Speaker Sizes
The 2015 BMW 740i factory audio system features specific location configurations. Center dash, front door panel, rear deck lid, and rear door panel accommodate 4 inch speakers and 1 inch units. Below seats accept an 8 inch speaker size. Compatible speaker types for replacement and upgrade include tweeter, midrange, and subwoofer.
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 |
|
2015 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: 02015 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 2015 BMW 740i audio system incorporates a multi-component speaker architecture with separate tweeters, midrange drivers, and subwoofers distributed across multiple locations throughout the cabin.
- Tweeters measuring 1 inch are positioned in four distinct locations: the center dash, front door panels, rear deck lid, and rear door panels, suggesting a focus on high-frequency dispersion across the sound stage.
- Midrange speakers at 4 inches occupy the same four locations as the tweeters, indicating a component-style configuration where different frequency ranges are handled by dedicated drivers rather than full-range coaxial speakers.
- An 8 inch subwoofer installed below the seats handles low-frequency reproduction, which may provide bass reinforcement without consuming trunk space.
- Replacing the factory speakers would likely require sourcing component-style aftermarket units with separate tweeters and midrange drivers, or installing coaxial speakers that combine both elements in a single housing.
- The relatively small 4 inch size of the midrange drivers suggests these units handle mid-frequency content while relying on the dedicated subwoofer for lower bass frequencies.
- Sound quality improvements through speaker replacement might be constrained by the physical size limitations, particularly with the 4 inch midrange units which typically offer less cone area than larger door speakers found in some other vehicles.
- The single DIN radio format provides a standard opening for potential head unit upgrades, though integration with factory amplifiers and digital sound processing would need consideration during replacement.
- Component speaker upgrades would need to address both the 1 inch tweeter and 4 inch midrange positions, potentially requiring crossover networks to properly divide frequencies between the drivers.