BMW M240i xDrive Center Dash Speaker Size
The BMW M240i xDrive center dash location accommodates 1 inch speaker size and 4 inch speakers. Compatible types for the location include tweeter and midrange audio units. These specifications cover the 2017 to 2018 system range.
| 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 M240i xDrive accommodates 2 distinct speaker sizes, a 1-inch driver and a 4-inch driver, each serving a separate acoustic function within the same installation zone.
- The center dash position places speakers along the vehicle's horizontal centerline, which is acoustically significant for staging, as centrally mounted drivers help anchor sound imaging toward the middle of the listening field.
- A 1-inch tweeter in the center dash of the BMW M240i xDrive handles high-frequency reproduction, typically covering the range from approximately 2 kHz upward, where directional sensitivity and transient detail are most concentrated.
- The small diaphragm diameter of a 1-inch tweeter allows rapid pistonic movement, which is necessary for accurately reproducing the fast transients found in high-frequency audio content.
- Tweeters mounted in the center dash project high-frequency energy forward toward the listening position, contributing to a focused and spatially defined soundstage across the front of the cabin.
- A 4-inch midrange driver in the center dash reproduces the mid-frequency band, generally spanning approximately 300 Hz to 5 kHz, which contains the majority of vocal and instrumental fundamental tones.
- The 4-inch cone diameter provides sufficient surface area to move enough air for midrange reproduction while remaining physically compact enough to fit within the constrained mounting depth typical of a center dash cavity.
- Midrange drivers in a center dash location are well-positioned to reproduce vocals and dialogue with accurate spatial localization, as the central mounting point corresponds closely to the perceived center of a stereo or multichannel image.
- Both the 1-inch and 4-inch speaker sizes share the same compatible type assignments across the 2017 and 2018 model years, indicating consistent speaker cavity dimensions and mounting configurations between those 2 years.