BMW 750Li Center Dash Speaker Size
The BMW 750Li center dash location accommodates a 1 inch speaker size and 4 inch units. Compatible audio types for the system include tweeters and midrange replacement units. These specifications cover 2006 through 2015.
| Year | Type | Size (inch) |
|---|---|---|
| 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 |
| 2009 | Tweeter | 1 |
| 2009 | Midrange | 4 |
| 2008 | Midrange | 4 |
| 2007 | Midrange | 4 |
| 2006 | 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 750Li sits along the vehicle's central axis, positioning speakers to project sound symmetrically toward both the driver and front passenger.
- A center dash mounting position typically places speakers within a shallow, angled cavity in the dashboard fascia, which constrains the available depth and diameter for speaker installation.
- The 4 inch midrange drivers specified for the center dash position across the 2006 through 2015 model years handle the mid-frequency band, generally covering approximately 500 Hz to 5 kHz, which encompasses vocals, instruments, and much of the core tonal content in audio reproduction.
- A 4 inch cone driver in the center dash location benefits from the central placement by distributing midrange frequencies evenly between seating positions, reducing the localization imbalance that offset drivers can create at those frequencies.
- Midrange drivers are dedicated single-band transducers designed to reproduce only the middle portion of the audible spectrum, avoiding the distortion that would occur if a full-range driver were tasked with the same frequency responsibilities in a restricted enclosure.
- The 1 inch tweeter size specified for the BMW 750Li center dash from 2009 through 2015 reflects a driver diameter suited to high-frequency reproduction, typically operating from around 2 kHz to 20 kHz.
- Tweeters are highly directional at the upper limits of their frequency range, and placement at the center dash position aligns the high-frequency dispersion axis with the listening area rather than projecting sound toward the windshield or floor.
- A 1 inch tweeter dome or cone presents a compact footprint, which is consistent with the spatial constraints of a center dash mounting cavity that must also accommodate a 4 inch midrange driver.
- The coexistence of a 1 inch tweeter and a 4 inch midrange at the same location indicates a multi-driver center dash configuration, where each driver operates within a dedicated frequency band rather than one driver covering the full range.
- The 2006, 2007, and 2008 model years list only the 4 inch midrange for the center dash position, without the 1 inch tweeter that appears in the 2009 through 2015 entries.
- The 4 inch midrange driver size occupies a physical footprint that can fit within typical dash panel cutouts while still providing sufficient cone area for adequate sensitivity and output across the midrange band.