Mercedes-Benz S400 Rear Door Panel Speaker Size
The Mercedes-Benz S400 rear door panel accommodates a 6.5 inch speaker size across all listed model years. Compatible types for the audio system include midbass and full-range replacement units. These specifications cover the 2010 to 2013 model year chart range.
| Year | Type | Size (inch) |
|---|---|---|
| 2013 | Midbass / Full-Range | 6.5 |
| 2012 | Midbass / Full-Range | 6.5 |
| 2011 | Midbass / Full-Range | 6.5 |
| 2010 | Midbass / Full-Range | 6.5 |
Speaker Types
| Type | Description |
|---|---|
| Midbass | A driver tuned for upper bass and lower midrange, roughly from 80 Hz to 500 Hz. It has longer cone travel than a full-range unit, which supports stronger bass in doors and panels. |
| Full-Range | A single driver that reproduces bass through treble without a separate crossover network. It is the simplest replacement option and is common in factory audio systems. |
Additional Notes
- The rear door panel location in the Mercedes-Benz S400 accommodates a 6.5 inch speaker across the 2010 through 2013 model years.
- Door panel installations position speakers within a sealed or semi-sealed cavity formed by the door's inner structure, which affects both bass loading and rear-wave reflections for the driver.
- A 6.5 inch driver in a door panel location produces a cone surface area large enough to move sufficient air for meaningful low-midrange and upper-bass reproduction within the cabin.
- The 6.5 inch diameter is a common door speaker size whose physical dimensions allow a mounting depth and basket width compatible with the spatial constraints typical of a mid-size to full-size sedan rear door cavity.
- Midbass drivers are acoustically optimized to reproduce frequencies roughly between 80 Hz and 500 Hz, covering the lower-midrange and upper-bass registers that contribute to the body and warmth of vocal and instrumental content.
- A midbass driver installed in the Mercedes-Benz S400 rear door panel operates in a location that is angled toward the rear passenger footwell area, meaning output is directed at seated passengers rather than projected forward into the front cabin.
- Full-range speakers are designed to reproduce a wider frequency spectrum within a single driver, typically from around 60 Hz up to 20 kHz, though high-frequency dispersion from a 6.5 inch cone diminishes significantly as frequency increases due to the physical beaming effect of larger diaphragms.
- When a full-range driver is mounted in a door panel, the low-frequency output benefits from the door cavity's acoustic reinforcement, while high-frequency content radiates in a narrow beam pattern due to the cone size at upper frequencies.
- The rear door panel placement positions the speaker at approximately seat-height level for rear passengers, which is a proximity advantage for low-to-mid frequency reproduction but a directional limitation for high-frequency content aimed at off-axis listeners.
- Both midbass and full-range types are listed as compatible with the 6.5 inch rear door opening in the S400, indicating the mounting cutout and depth accommodate either driver configuration without requiring separate adapter modifications specific to one type over the other.