Mercedes-Benz CL550 Rear Door Panel Speaker Size
The Mercedes-Benz CL550 rear door panel accommodates a 4 inch speaker size across all listed model years. Compatible types for the audio system include midrange units. These specifications cover the 2007 to 2014 model year range.
| Year | Type | Size (inch) |
|---|---|---|
| 2014 | Midrange | 4 |
| 2013 | Midrange | 4 |
| 2012 | Midrange | 4 |
| 2011 | Midrange | 4 |
| 2010 | Midrange | 4 |
| 2009 | Midrange | 4 |
| 2008 | Midrange | 4 |
| 2007 | 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 rear door panel location on the Mercedes-Benz CL550 positions speakers within the lower lateral section of the cabin, placing the driver cone at roughly seat-level height and angled toward the passenger compartment.
- Door panel enclosures are shallow and constrained by the interior door cavity, which limits the available depth and baffle area for speaker mounting.
- A 4-inch speaker diameter corresponds to a compact cone surface area, which in a door panel cavity produces a relatively controlled dispersion pattern suited to close-range listening positions at seat level.
- The physical size of a 4-inch driver restricts low-frequency extension due to limited cone excursion and radiating surface, placing the effective output range above the bass frequencies typically handled by woofers or subwoofers.
- Midrange drivers are designed to reproduce frequencies roughly between 300 Hz and 5,000 Hz, the band that contains the fundamental tones and harmonics of vocals and most acoustic instruments.
- In a rear door panel location, a midrange driver at 4 inches handles the portion of the frequency spectrum most critical to speech intelligibility and tonal presence within the rear seating area.
- The Mercedes-Benz CL550 rear door panel accepts only midrange as the compatible type across all listed model years, excluding full-range, woofer, or tweeter configurations from the specified fitment.
- Midrange speakers lack the internal passive crossover or whizzer cone extensions found in full-range drivers, making the 4-inch midrange in the CL550 rear door dependent on an external crossover network to filter frequencies outside the intended band.
- The rear door panel position places the 4-inch midrange driver at a greater distance from front-seat listeners compared to front door locations, which affects time alignment and the spatial imaging contribution of the rear channel.
- Door panel installations require the speaker frame to mount flush against the panel substrate, meaning the 4-inch driver must conform to the factory cutout diameter and mounting hole pattern of the CL550 rear door.