Mercedes-Benz 240D Dashboard Speaker Size
The Mercedes-Benz 240D dashboard accommodates a 4 inch speaker size in the dashboard location. Midrange units are the compatible speaker type for the audio system. These specifications cover the years 1974 to 1983.
| Year | Type | Size (inch) |
|---|---|---|
| 1983 | Midrange | 4 |
| 1982 | Midrange | 4 |
| 1981 | Midrange | 4 |
| 1980 | Midrange | 4 |
| 1979 | Midrange | 4 |
| 1978 | Midrange | 4 |
| 1977 | Midrange | 4 |
| 1976 | Midrange | 4 |
| 1975 | Midrange | 4 |
| 1974 | Midrange | 4 |
Speaker Types
| Type | Description |
|---|---|
| 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 dashboard speaker location in the Mercedes-Benz 240D sits within the instrument panel structure, a shallow, enclosed cavity that imposes strict depth and diameter constraints on any installed driver.
- A 4 inch driver in a dashboard position operates with limited rear clearance, as the instrument panel housing typically leaves minimal depth behind the mounting surface for magnet assemblies and cone excursion.
- The 4 inch diameter of the dashboard speaker opening in the Mercedes-Benz 240D defines the maximum cone area available for sound radiation at this location, directly affecting how much air the driver can move.
- Dashboard placement positions speakers at the front of the listening environment and near the base of the windshield, which allows reflected sound off the glass to contribute to the perceived soundstage.
- A midrange driver is acoustically designed to reproduce frequencies roughly between 300 Hz and 5,000 Hz, covering the core band where fundamental tones of vocals and most acoustic instruments are concentrated.
- The midrange type is the sole compatible type listed for the 240D dashboard across all specified model years, indicating the opening is sized and positioned specifically for mid-frequency reproduction rather than full-range or dedicated high-frequency use.
- At 4 inches, a midrange driver in the dashboard of the 240D handles the vocal presence range effectively, as the cone area is sufficient for mid-frequency movement without the added mass that would limit a larger driver's upper-range response.
- Dashboard-mounted midrange drivers benefit from proximity to ear level in a seated position, placing the primary mid-frequency source closer to the listener than door or rear deck locations would.
- A 4 inch midrange driver typically exhibits a moderately wide dispersion pattern across its operating band, which suits a near-field installation like a dashboard where the listening position is relatively close to the source.
- The midrange type does not reproduce deep bass frequencies, meaning the 240D dashboard location is acoustically isolated from low-frequency duty, which also reduces the mechanical stress on the small mounting structure of the instrument panel.