BMW M4 Center Dash Speaker Size
The BMW M4 center dash location accommodates a 1 inch speaker size and 4 inch speakers. Compatible types for the audio system include tweeters and midrange units. The specifications cover a range of years from 2015 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 |
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 M4 accommodates 2 distinct speaker sizes: 1 inch and 4 inch.
- The center dash position places speakers near the horizontal plane of the windshield base, a location that projects sound toward the listening area from a forward, centrally anchored point in the cabin.
- A 1-inch driver in the center dash position handles high-frequency content, typically in the range of approximately 2,000 Hz and above, where short wavelengths benefit from the forward-facing, centralized placement to produce a stable stereo image across the front seating area.
- The 4-inch driver in the BMW M4 center dash handles midrange frequencies, generally spanning roughly 300 Hz to 5,000 Hz, covering the critical band where vocals, instruments, and speech intelligibility are most prominent.
- A tweeter's small diaphragm size allows for wide horizontal dispersion of high frequencies from the dash-mounted position, contributing to a broad and even treble distribution across the front cabin.
- The 4-inch midrange driver's cone area is large enough to move sufficient air for mid-frequency reproduction while remaining compact enough to fit within the spatial constraints of a center dash housing.
- Center dash installations typically involve shallow mounting depth requirements, as the dash structure limits the available cavity behind the speaker baffle, a factor relevant to both the 1-inch and 4-inch driver configurations in the BMW M4.
- A midrange driver installed at the center dash position focuses on frequencies where human hearing is most sensitive, making placement accuracy and enclosure rigidity in that location directly relevant to perceived audio clarity.
- The pairing of a tweeter and a midrange driver at the center dash across the 2015 through 2018 BMW M4 model years indicates a two-driver configuration at that location, requiring crossover filtering to divide the frequency signal appropriately between the two sizes.
- The 1-inch tweeter's high-frequency directional characteristics mean that small angular deviations in mounting angle at the center dash can noticeably affect treble dispersion toward seated occupants.