BMW 440i xDrive Gran Coupe Rear Speaker Size
The BMW 440i xDrive Gran Coupe rear location accommodates 1 inch and 4 inch speaker size units, with each size supporting distinct audio configurations. Compatible types include tweeter and midrange system replacements for the rear position. The specifications cover a range of 2017 to 2018.
| Year | Type | Size (inch) |
|---|---|---|
| 2018 | Tweeter | 1 |
| 2018 | Midrange | 4 |
| 2017 | Tweeter | 1 |
| 2017 | 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 speaker location in the BMW 440i xDrive Gran Coupe accommodates 2 distinct speaker sizes, 1 inch and 4 inch, each assigned to a separate compatible type.
- A 1-inch tweeter in the rear location operates in the high-frequency range, typically above 2,000 Hz, where short wavelengths require a small, light diaphragm to reproduce treble detail with accuracy.
- Placement of a 1-inch tweeter at the rear contributes to high-frequency dispersion toward the rear cabin, which broadens the perceived stereo soundstage for passengers seated in the back.
- The 4-inch midrange designation covers the frequency band most closely associated with vocal intelligibility and upper-harmonic instrument reproduction, generally spanning roughly 300 Hz to 5,000 Hz.
- A 4-inch driver in a rear location operates within a physically constrained mounting space, where the relatively compact cone area limits low-frequency extension but permits controlled directional output within the midrange band.
- The BMW 440i xDrive Gran Coupe rear location requires separate cutouts or mounting points for both the 1-inch and 4-inch drivers, as the 2 sizes are listed as distinct, non-interchangeable entries rather than alternatives.
- Midrange drivers at 4 inches are commonly mounted in door panels or rear deck positions, where enclosure depth and baffle area influence the efficiency of mid-frequency reproduction in the cabin environment.
- The pairing of a tweeter and a midrange at the rear position indicates a multi-driver configuration rather than a single full-range speaker, which typically requires a crossover network to divide the incoming signal between the 2 drivers by frequency.
- Both model years represented in the specifications, 2017 and 2018, share identical size and type pairings at the rear location, indicating dimensional and type consistency across the 2-year span covered.