BMW 740Ld xDrvie Rear Door Panel Speaker Size
The BMW 740Ld xDrive rear door panel accommodates a 1 inch speaker size and 4 inch speakers. Compatible types across these locations include tweeter and midrange audio units. These specifications cover the 2015 model year.
| Year | Type | Size (inch) |
|---|---|---|
| 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 rear door panel of the 2015 BMW 740Ld xDrive accommodates 2 distinct speaker sizes within the same installation zone.
- A 1-inch driver mounted in the rear door panel operates as a tweeter, a speaker type designed to reproduce high-frequency content, typically from around 2,000 Hz up to 20,000 Hz or beyond.
- The compact 1-inch diameter of the tweeter in the rear door panel is acoustically appropriate for high-frequency reproduction, as smaller diaphragm surfaces move rapidly and with precision at elevated frequencies.
- At a rear door panel location, a tweeter contributes to high-frequency dispersion within the cabin's passenger compartment, projecting upper-range detail toward seated occupants.
- The 4-inch driver in the rear door panel is designated for midrange use, covering the frequency band that typically spans from approximately 300 Hz to 5,000 Hz, which includes the bulk of vocal and instrumental content.
- The 4-inch midrange in the BMW 740Ld xDrive rear door panel represents a mid-sized cone diameter, balancing sufficient surface area for lower-midrange output with the physical constraints of a door panel cavity.
- Door panel installations generally position speakers within a recessed mounting surface, where depth clearance and baffle dimensions determine which driver sizes are mechanically compatible with the housing.
- A midrange driver at a rear door panel location directs sound output laterally across the rear seating area, where the door surface acts as the mounting baffle influencing the driver's acoustic loading.
- The separation of high-frequency and midrange duties across 2 discrete driver sizes in the rear door panel reflects a multi-way speaker arrangement within a single installation zone.