2015 BMW 740i Speaker Sizes
The 2015 BMW 740i speaker size chart details factory audio system specifications across multiple locations. Information covers front door panel speakers, rear door panel speakers, center dash speakers, rear deck lid speakers, and speakers below seats. Available data helps match replacement or aftermarket upgrade speakers to original factory specifications for each position within the audio system.
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| 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.