BMW Alpina B6 xDrive Gran Coupe Center Dash Speaker Size
The BMW Alpina B6 xDrive Gran Coupe center dash accommodates 1 inch speaker size and 4 inch units across all listed model years. Compatible types for these locations include tweeters and midrange units. The specifications cover the 2015 to 2018 model year range.
| Year | Type | Size (inch) |
|---|---|---|
| 2018 | Tweeter | 1 |
| 2018 | Midrange | 4 |
| 2017 | Tweeter | 1 |
| 2017 | Midrange | 4 |
| 2016 | Tweeter | 1 |
| 2016 | Midrange | 4 |
| 2015 | Tweeter | 1 |
| 2015 | 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 B6 xDrive Gran Coupe accommodates 2 distinct speaker sizes across all listed model years: 1 inch and 4 inch.
- The center dash position places speakers along the forward-most surface of the cabin interior, oriented toward the passenger compartment from a central horizontal axis between the driver and front passenger.
- A 1-inch tweeter in the center dash location is suited to high-frequency reproduction, typically handling frequencies above 2,000 Hz, where directional imaging and stereo soundstage width are influenced by the placement of the source relative to the listening position.
- The center dash mounting point for a 1-inch tweeter means high-frequency content originates from the vehicle's longitudinal centerline, contributing to a symmetrical front soundstage between the two front seating positions.
- Tweeters are small-diaphragm transducers designed for high-frequency accuracy; the 1-inch diameter of the units specified for the BMW Alpina B6 xDrive Gran Coupe center dash is a standard dimension for dome tweeters used in automotive high-frequency reproduction.
- A 4-inch midrange driver handles the middle portion of the audible frequency spectrum, generally from approximately 300 Hz to 5,000 Hz, covering vocals, upper harmonics, and instrument presence frequencies.
- The 4-inch cone diameter of the midrange unit allows for controlled directivity in the mid frequencies, which is relevant at a center dash location where the driver is positioned at an off-axis angle relative to the speaker.
- Midrange drivers of 4 inches are physically compact relative to woofers, making the center dash a viable mounting location where depth and surface area are limited by dashboard construction.
- The simultaneous presence of both a 1-inch tweeter and a 4-inch midrange in the center dash across all listed model years indicates a multi-driver configuration at that single location, requiring the dashboard structure to accommodate 2 separate mounting apertures.
- Because the center dash sits close to the windshield base, acoustic reflections from the glass surface can affect the frequency response of both the midrange and tweeter mounted at that position.