BMW 740Li Center Dash Speaker Size
The BMW 740Li center dash location accommodates a 1 inch speaker size and 4 inch speakers across all listed model years. Compatible audio system types for the center dash include tweeter and midrange units. The specifications cover a range from 2011 to 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 |
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 740Li sits along the central axis of the dashboard, positioning speakers to project sound evenly toward both front occupants rather than favoring either side of the cabin.
- A center dash installation is typically a shallow-depth mounting environment, where available depth behind the mounting surface is limited by dashboard structure, HVAC ducting, and other components.
- The 4-inch diameter specified for the midrange role in the BMW 740Li center dash represents a cone surface area small enough to fit within dashboard cavities while still moving sufficient air to reproduce the vocal and instrumental midrange frequencies that span roughly 500 Hz to 5,000 Hz.
- Midrange speakers in a center dash position are particularly relevant to speech intelligibility and vocal reproduction, as the center channel in multi-speaker automotive systems commonly anchors dialogue and center-stage audio content.
- The 4-inch midrange cone is a physically stiff, moderate-mass driver whose frequency focus makes it unsuitable for low-frequency reproduction but well-matched to the directional, reflective acoustic environment inside a dashboard enclosure.
- The 1-inch tweeter specified across all listed model years for the BMW 740Li center dash location uses a small-diameter diaphragm-typically dome-shaped-that radiates high frequencies beginning around 2,000 Hz to 3,500 Hz and extending to 20,000 Hz or beyond.
- A 1-inch tweeter mounted at center dash benefits from the elevated, forward-facing angle typical of dashboard speaker grilles, which directs high-frequency energy-known to travel in a narrow, beam-like pattern-toward the listening area rather than dispersing it laterally.
- High-frequency sounds handled by a 1-inch tweeter are highly directional, meaning the physical aim of the mounting position in the center dash has a measurable effect on perceived treble presence and stereo imaging within the vehicle cabin.
- The pairing of a 1-inch tweeter and a 4-inch midrange within the same center dash location indicates a two-driver arrangement where each speaker handles a distinct portion of the audible frequency spectrum, dividing acoustic responsibilities between high and mid frequencies at that single installation point.
- Across all model years listed-2011 through 2015-the BMW 740Li center dash maintains identical speaker size specifications of 1 inch for the tweeter and 4 inches for the midrange, indicating dimensional consistency in the mounting location across the production span covered.