2013 BMW 128i Speaker Sizes
The 2013 BMW 128i speaker size chart provides factory audio system specifications for replacement or aftermarket upgrade purposes. Information covers speaker locations throughout the vehicle, including front door panel, rear deck lid, rear side panel, and below seats positions. Factory speaker specifications are listed to assist with aftermarket component compatibility and audio system modifications.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Below Seats | 8 | Subwoofer |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 4 | Midrange |
|
| Rear Deck Lid | 1 | Tweeter |
|
| Rear Deck Lid | 4 | Midrange |
|
| Rear Side Panel | 1 | Tweeter |
|
| Rear Side Panel | 4 | Midrange |
|
2013 BMW 128i Speaker Replacement Summary
7
total positions
4
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 4 Medium: 3 High: 0Replacement priority:
High: 2 Medium: 3 Low: 22013 BMW 128i 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 2013 BMW 128i incorporates a three-way speaker configuration across multiple locations, with dedicated tweeters, midrange drivers, and a subwoofer position working together to cover different frequency ranges throughout the cabin.
- Tweeters measuring 1 inch are positioned in three separate locations including the front door panels, rear deck lid, and rear side panels, suggesting a distributed approach to high-frequency sound reproduction.
- Midrange speakers at 4 inches share the same mounting locations as the tweeters in the front doors, rear deck, and rear side panels, indicating component-style speaker placement rather than full-range coaxial designs in these positions.
- The below-seats location accommodates an 8-inch subwoofer, which may provide low-frequency reinforcement without consuming trunk space that would be required by traditional enclosures in the cargo area.
- Replacing the factory speakers in the 2013 BMW 128i would likely involve sourcing component sets with separate 1-inch tweeters and 4-inch midrange drivers, as the stock configuration separates these frequency ranges across distinct speaker elements.
- The radio opening accepts both single DIN and double DIN head units, potentially allowing for aftermarket receiver installations with expanded features or improved signal processing capabilities to drive upgraded speakers.
- Sound improvement efforts might focus on the 4-inch midrange positions first, as these drivers typically handle the critical vocal and instrumental frequencies that tend to be most noticeable during everyday listening.
- The relatively small 4-inch midrange size could limit low-frequency extension in the vocal range, which the 8-inch subwoofer position below the seats might help compensate for when properly integrated with appropriate crossover settings.