BMW 750i xDrive Center Dash Speaker Size
The BMW 750i xDrive center dash accommodates a 1 inch speaker size and 4 inch speakers, supporting both unique speaker sizes across all listed model years. Compatible types for these units include tweeters and midrange speakers. The specifications cover a range from 2010 to 2018.
| 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 |
| 2014 | Tweeter | 1 |
| 2014 | Midrange | 4 |
| 2013 | Tweeter | 1 |
| 2013 | Midrange | 4 |
| 2012 | Tweeter | 1 |
| 2012 | Midrange | 4 |
| 2011 | Tweeter | 1 |
| 2011 | Midrange | 4 |
| 2010 | Tweeter | 1 |
| 2010 | 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 750i xDrive sits along the horizontal plane of the instrument panel, positioning speakers to radiate sound toward the upper body and head level of front occupants.
- A center dash mounting position is typically shallow in depth, with limited cavity volume behind the baffle, which constrains the cone excursion and enclosure space available to any installed driver.
- The 4-inch midrange specification for the BMW 750i xDrive center dash covers the mid-frequency band, generally spanning from approximately 300 Hz to 5 kHz, the range most associated with vocal intelligibility and instrument body.
- A 4-inch cone diameter produces a relatively controlled dispersion pattern at upper midrange frequencies, meaning sound from the center dash position is directed with moderate focus toward front-seat listening positions.
- The compact 4-inch diameter is well suited to the constrained mounting depth characteristic of dashboard panel locations, where larger cone drivers would require enclosure volumes that the dash cavity cannot accommodate.
- The 1-inch tweeter specification addresses high-frequency reproduction, generally covering content above approximately 2 kHz and extending toward the upper limit of human hearing near 20 kHz.
- A 1-inch tweeter dome, the most common form factor for the 1-inch designation, exhibits wide horizontal dispersion at high frequencies, making the center dash an effective position for distributing treble content across both driver and passenger seats.
- Mounting a 1-inch tweeter in the center dash places the high-frequency source at a forward, centralized point in the vehicle interior, contributing to a perceived center image for audio sources panned to the front soundstage.
- The 1-inch driver's small diaphragm mass allows rapid acceleration and deceleration at high frequencies, which is acoustically significant for transient detail in upper harmonic content.
- The pairing of a 1-inch tweeter and a 4-inch midrange within the same center dash location indicates a multi-driver configuration at a single mounting zone, distributing frequency responsibilities between 2 physically separate drivers.
- The 4-inch midrange in a center dash position handles the frequency range where human speech fundamentals and lower harmonics are most prominent, placing vocal reproduction at a centrally located source point between the left and right channels.
- Across the 2010 through 2018 model years, the BMW 750i xDrive center dash accommodates both a 1-inch tweeter and a 4-inch midrange, maintaining consistent mounting cutout dimensions and driver sizing throughout that production span.