BMW 228i Center Dash Speaker Size
The BMW 228i center dash location accommodates 1 inch speaker size and 4 inch speakers across all listed model years. Compatible types for these units include tweeters and midrange speakers. The specifications cover a range from 2014 to 2016.
| Year | Type | Size (inch) |
|---|---|---|
| 2016 | Tweeter | 1 |
| 2016 | Midrange | 4 |
| 2015 | Tweeter | 1 |
| 2015 | Midrange | 4 |
| 2014 | Tweeter | 1 |
| 2014 | Midrange | 4 |
Speaker Types
| Type | Description |
|---|---|
| Tweeter | A small driver built for high frequencies, typically from about 2,000 Hz to 20,000 Hz. It adds treble detail and clarity and is usually mounted near ear level or aimed at the listener. |
| Midrange | A driver for the middle of the audible range, typically from about 300 Hz to 5,000 Hz, where vocals and most instruments sit. It is often paired with a tweeter and a woofer. |
Additional Notes
- The center dash location in the BMW 228i sits at the uppermost forward point of the cabin interior, placing speakers close to ear level and near the windshield's reflective surface.
- A 1-inch tweeter in the center dash position handles high-frequency reproduction, typically covering the range from around 2,000 Hz up to 20,000 Hz or beyond, where directional hearing sensitivity is greatest.
- The center dash placement of a 1-inch tweeter takes advantage of the position's direct line to the listening area, as high-frequency sound waves travel in tight, narrow patterns and benefit from forward-facing, centrally located mounting.
- A 4-inch midrange driver in the center dash handles frequencies generally spanning from around 300 Hz to 5,000 Hz, covering the vocal presence range and much of the tonal detail in music and speech.
- The 4-inch diameter of the midrange unit is a physically compact format that suits the constrained mounting depth and surface area typical of center dash panels, where cavity space behind the baffle is limited.
- The BMW 228i center dash accommodates both a 1-inch tweeter and a 4-inch midrange simultaneously across the 2014, 2015, and 2016 model years, indicating a 2-way speaker arrangement at this location.
- In a 2-way center dash configuration, the midrange driver reproduces the core frequency content while the tweeter extends the upper harmonic detail, with crossover components typically dividing responsibilities between the 2 drivers.
- The center dash position subjects speakers to elevated thermal conditions due to solar exposure through the windshield, which is a relevant mechanical consideration for driver materials in both the 1-inch and 4-inch units.
- A 4-inch midrange cone area is large enough to move sufficient air for clear midband reproduction but small enough that cone breakup and beaming distortion remain minimal within the intended frequency range for this position.
- The 1-inch tweeter format used at the center dash of the BMW 228i is one of the most common tweeter sizes in automotive applications, with dome or silk dome diaphragms typical at this diameter for controlled high-frequency dispersion.