BMW 740e xDrive Center Dash Speaker Size
The BMW 740e xDrive center dash location accommodates a 1 inch speaker size and 4 inch speakers across the model range. Compatible types for the audio system include tweeter and midrange replacement units. These specifications cover the 2017 to 2018 model years.
| Year | Type | Size (inch) |
|---|---|---|
| 2018 | Tweeter | 1 |
| 2018 | Midrange | 4 |
| 2017 | Tweeter | 1 |
| 2017 | 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 740e xDrive accommodates 2 distinct speaker sizes, 1 inch and 4 inch, each assigned to a different speaker type.
- A 1-inch tweeter mounted at the center dash occupies minimal physical footprint, which suits the shallow, constrained depth typical of dashboard cavities in this position.
- The center dash position places tweeters near ear level and toward the horizontal center of the cabin, a placement that supports precise high-frequency imaging across the front soundstage.
- Tweeters reproduce high-frequency content, generally above 2,000 Hz, where directional perception is most acute, making the center dash a acoustically significant mounting point for stereo or center-channel imaging.
- A 4-inch midrange speaker at the center dash handles the vocal and instrumental frequency band, roughly 300 Hz to 5,000 Hz, where much of the harmonic detail in music and speech is concentrated.
- The 4-inch diameter of the midrange driver reflects a balance between cone surface area and the physical constraints of the center dash cavity, where larger drivers would require deeper enclosure depth and more surface clearance.
- Midrange drivers at the center dash position project sound directly toward seated occupants, supporting focused reproduction of mid-frequency content without wide lateral dispersion.
- The BMW 740e xDrive center dash fitment supports both a 1-inch tweeter and a 4-inch midrange as compatible types, indicating the location can be configured with either driver depending on the audio system installed.
- In a center dash installation, the proximity of the tweeter and midrange to the windshield surface can introduce acoustic reflections, a factor relevant to the directional characteristics of both driver types at the specified sizes.
- The 1-inch tweeter size is standard for high-frequency drivers, as the small diaphragm mass allows rapid movement necessary to reproduce short-wavelength, high-frequency audio signals accurately.