2014 BMW 328i Speaker Sizes
The 2014 BMW 328i speaker size chart provides factory specifications for all audio system locations. Information includes speaker sizes for the center dash, front door panel, rear deck lid, rear door panel, and below seats. These specifications assist with replacement or aftermarket upgrade planning for the vehicle 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 |
|
2014 BMW 328i 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: 02014 BMW 328i Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN or Double DIN | 7"×2" or 7"×4" | 180×50 or 180×100 | Vehicle supports both radio sizes |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 2014 BMW 328i factory audio system utilizes a three-way speaker configuration with dedicated tweeters, midrange drivers, and a subwoofer, which suggests a focus on frequency separation for potentially enhanced sound quality across the spectrum.
- All tweeter locations across the vehicle accept 1-inch units, indicating a standardized high-frequency component throughout the cabin that may simplify replacement planning when upgrading multiple positions.
- The midrange drivers are uniformly sized at 4 inches across all four locations, which could allow for consistent mid-frequency response when replacing speakers in the center dash, door panels, and rear deck lid.
- An 8-inch subwoofer positioned below the seats handles low-frequency reproduction, and this under-seat placement may have been chosen to preserve cargo space while still providing bass extension.
- The radio bay accommodates both single DIN and double DIN head units, which provides flexibility for aftermarket stereo installations without requiring custom modifications to the dashboard.
- Replacing the tweeters and midrange drivers as matched component sets might maintain the intended frequency crossover characteristics, though the specifications do not indicate whether the factory system uses passive or active crossovers.
- The distribution of eight total speaker positions plus a subwoofer suggests a multi-channel amplifier setup may be present, which could affect the impedance requirements and power handling considerations for replacement speakers.
- Upgrading the under-seat subwoofer may be constrained by the available depth and mounting configuration in that location, factors that would need verification before selecting an aftermarket replacement.