BMW 740i xDrive Center Dash Speaker Size
The BMW 740i xDrive center dash location accommodates a 1 inch speaker size and 4 inch speakers across the model range. Compatible types for these units include tweeter and midrange audio system components. 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 740i xDrive accommodates 2 distinct speaker sizes simultaneously, indicating a multi-driver configuration within a single mounting zone.
- A 1-inch tweeter at the center dash position handles high-frequency reproduction, typically covering the upper range from around 2 kHz to 20 kHz, where directional imaging and vocal articulation are concentrated.
- The center dash is a forward-facing, centrally positioned surface, which makes it acoustically suited for a tweeter, as high-frequency sound is highly directional and benefits from placement aimed toward the listening plane of front occupants.
- A 4-inch midrange driver at the center dash position handles the mid-frequency band, generally spanning roughly 300 Hz to 5 kHz, which encompasses the core of vocal frequencies and a significant portion of most instruments.
- The 4-inch diameter of the midrange driver reflects a balance between cone surface area and physical fitment constraints typical of center dash cavities, where depth clearance is often limited by dashboard structure.
- Midrange drivers of 4 inches are less directional than tweeters but more directional than woofers, making center dash placement relevant for anchoring vocal and instrumental presence toward the front soundstage of the cabin.
- The BMW 740i xDrive center dash position supports both a tweeter and a midrange driver across the 2017 and 2018 model years, suggesting the mounting cavity and wiring configuration accommodate both driver types within the same location.
- A 1-inch tweeter dome is physically compact, which is consistent with the shallow mounting depths typically available within a center dash panel, where structural components behind the surface restrict rear clearance.