Mercedes-Benz GL320 Rear Door Panel Speaker Size
The Mercedes-Benz GL320 rear door panel accommodates a 6.5 inch speaker size and 1 inch speakers. Compatible types for the location include midbass, full-range, and tweeter units. The specifications cover the 2007 to 2009 model years.
| Year | Type | Size (inch) |
|---|---|---|
| 2009 | Midbass / Full-Range | 6.5 |
| 2009 | Tweeter | 1 |
| 2008 | Midbass / Full-Range | 6.5 |
| 2008 | Tweeter | 1 |
| 2007 | Midbass / Full-Range | 6.5 |
| 2007 | Tweeter | 1 |
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. |
| 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 panels of the Mercedes-Benz GL320 accommodate 2 distinct speaker sizes simultaneously, indicating a multi-driver configuration built into the door panel enclosure across all listed model years.
- A 6.5 inch driver mounted in a rear door panel occupies a mid-sized woofer position, where the door cavity itself acts as a partial enclosure that influences low-frequency extension and cone excursion behavior.
- The 6.5 inch position in the rear door of the Mercedes-Benz GL320 is compatible with midbass and full-range types, meaning the location supports either a driver focused on the lower midrange and upper bass frequencies or one covering the broader audible spectrum from a single cone.
- A midbass driver in a rear door location handles roughly 80 Hz to 500 Hz, reinforcing kick, bass guitar, and lower vocal fundamentals within the rear cabin zone.
- A full-range driver in the same 6.5 inch rear door position covers a wider band, typically spanning from around 60 Hz up to several kilohertz, though high-frequency dispersion from a cone of that diameter narrows considerably at the upper end.
- The 1 inch driver position in the rear door panel places a tweeter in a location designed to restore upper-frequency content that a 6.5 inch cone cannot efficiently radiate at short wavelengths.
- A 1 inch tweeter reproduces frequencies generally above 2 kHz to 3 kHz, where wavelengths are short enough that a small dome or cone maintains wide dispersion without significant beaming.
- Mounting a 1 inch tweeter within a door panel positions the high-frequency source at a relatively low height in the rear cabin, which affects the perceived soundstage and angle of arrival for upper harmonics reaching rear passengers.
- The coexistence of a 1 inch tweeter and a 6.5 inch woofer-class driver in the same door panel implies a crossover point is required, either passively within a component speaker set or actively through the head unit or amplifier, to divide the frequency bands between the 2 drivers.
- Door panel installations are subject to road noise, panel resonance, and vibration coupling, all of which interact with the rear door's acoustic environment and can affect the performance of both the 6.5 inch and 1 inch drivers at their respective operating frequencies.