BMW Alpina B7 xDrive Center Dash Speaker Size
The BMW Alpina B7 xDrive center dash location accommodates a 1 inch speaker size and 4 inch units across all listed model years. Compatible speaker types for these positions include tweeters and midrange units. The specifications cover a range of years from 2011 to 2018.
| Year | Type | Size (inch) |
|---|---|---|
| 2018 | Tweeter | 1 |
| 2018 | Midrange | 4 |
| 2015 | Tweeter | 1 |
| 2015 | Midrange | 4 |
| 2014 | Tweeter | 1 |
| 2014 | Midrange | 4 |
| 2013 | Tweeter | 1 |
| 2013 | Midrange | 4 |
| 2012 | Tweeter | 1 |
| 2012 | Midrange | 4 |
| 2011 | Tweeter | 1 |
| 2011 | 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 Alpina B7 xDrive accommodates 2 distinct speaker sizes across all listed model years: 1 inch and 4 inch.
- The center dash position sits along the horizontal plane of the dashboard, placing speakers at a relatively low height and forward-facing angle relative to the vehicle's occupants.
- A center dash mounting point is typically a shallow, constrained cavity with limited depth, which influences the physical profile of any compatible speaker enclosure.
- The 1 inch tweeter at the center dash position handles high-frequency reproduction, generally operating in the range above 2,000 Hz, where directional imaging and treble detail are concentrated.
- Placement of a 1 inch tweeter at the center dash allows high-frequency content to radiate toward the listening plane of seated occupants, supporting stereo imaging from a centrally anchored source point.
- The 4 inch midrange speaker covers the frequency band typically associated with vocal clarity and upper-mid tonal definition, generally spanning roughly 300 Hz to 5,000 Hz depending on crossover configuration.
- A 4 inch cone diameter provides a moderate radiating surface area, which in a center dash location allows midrange frequencies to project forward into the cabin without the low-end excursion demands that would require a larger driver.
- The pairing of a 1 inch tweeter and a 4 inch midrange in the same center dash location indicates a multi-driver configuration at that mounting position, with each driver handling a separate portion of the frequency spectrum.
- The BMW Alpina B7 xDrive center dash specification lists both driver types as compatible for every model year from 2011 through 2018, with no variation in size across that range.
- Midrange drivers of the 4 inch class are mechanically suited to shallow-depth installations because the smaller cone excursion requirements at mid frequencies allow for a reduced basket depth compared to woofers of equivalent diameter.
- A 1 inch tweeter dome is a common form factor in automotive center dash positions due to the compact footprint required to fit within narrow dashboard panel cutouts.