2018 BMW 340i Speaker Sizes
The 2018 BMW 340i speaker size chart lists factory audio system specifications for replacement or aftermarket upgrade purposes. Information includes speaker locations throughout the vehicle: center dash, front door panel, rear deck lid, rear door panel, and below seats. Details provided assist in identifying compatible aftermarket speakers based on factory specifications.
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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 |
|
2018 BMW 340i 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: 0Additional Notes
- The 2018 BMW 340i factory audio system incorporates a multi-driver configuration with dedicated tweeters, midrange speakers, and a subwoofer positioned across multiple locations throughout the cabin.
- Tweeters measuring 1 inch are installed in four separate locations: the center dash, front door panels, rear deck lid, and rear door panels, suggesting a focus on high-frequency dispersion throughout the listening environment.
- Midrange drivers at 4 inches occupy the same four mounting locations as the tweeters, indicating a component-style setup rather than coaxial full-range speakers in most positions.
- The subwoofer location below the seats may present space constraints for aftermarket upgrades, as under-seat installations typically limit the physical size and enclosure volume available for replacement units.
- Replacing the 4-inch midrange drivers could potentially yield noticeable improvements in vocal clarity and instrumental detail, as this frequency range handles much of the core musical content.
- The separate tweeter and midrange configuration allows for independent upgrades, meaning owners could replace one type without necessarily addressing the other, though matched component sets might provide better tonal balance.
- The 1-inch tweeter size is relatively standard, which should provide reasonable compatibility with aftermarket component speaker sets designed for European vehicles.
- The 8-inch subwoofer represents the sole dedicated low-frequency driver in the system, suggesting that bass reproduction relies entirely on this single under-seat unit.