BMW 740Ld xDrive Center Dash Speaker Size
The BMW 740Ld xDrive center dash location accommodates a 1 inch speaker size and 4 inch speakers. Compatible types for the center dash include tweeter and midrange audio units. These specifications cover the 2015 model year.
| Year | Type | Size (inch) |
|---|---|---|
| 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 2015 BMW 740Ld xDrive accommodates 2 distinct speaker sizes, each assigned to a separate frequency role.
- A 1-inch driver in the center dash position operates as a tweeter, a size associated with reproducing high-frequency content, typically from around 2,000 Hz up to 20,000 Hz or beyond.
- The small physical diameter of the 1-inch tweeter allows the diaphragm to move rapidly enough to reproduce transient high-frequency detail with relatively focused directionality from the center dash position.
- The 4-inch driver in the center dash is designated as a midrange, a speaker type responsible for frequencies roughly between 300 Hz and 5,000 Hz, covering the core band where vocals and many acoustic instruments are concentrated.
- A 4-inch cone diameter provides sufficient surface area to move air for midrange reproduction while remaining compact enough to fit within the spatial constraints of a center dash enclosure.
- The center dash position places both drivers at or near the horizontal plane of the windshield base, a location that contributes to forward-facing sound staging toward the front occupants.
- The 2015 BMW 740Ld xDrive center dash mounting configuration requires separate cutout or housing dimensions for the 1-inch and 4-inch drivers, as the 2 sizes are not interchangeable within the same opening.
- Midrange drivers in a center dash location are typically tasked with anchoring the perceived center of the stereo image, reinforcing dialogue and vocal presence between the left and right channels.
- The tweeter at the 1-inch size in a center dash position tends to project high-frequency content in a relatively narrow dispersion pattern, which can affect the perceived width of the high-frequency soundstage from that position.