BMW 440i Gran Coupe Rear Speaker Size
The BMW 440i Gran Coupe rear location accommodates a 1 inch speaker size and 4 inch speakers. Compatible types for the audio system include tweeter and midrange replacement units. These specifications cover the 2017 to 2018 chart of model years.
| 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 Gran Coupe accommodates 2 distinct speaker sizes, specifically 1 inch and 4 inch, each assigned to a different driver type.
- A 1-inch tweeter operates in the high-frequency range, typically reproducing sounds above 2,000 Hz, including upper harmonics, consonants in vocals, and the shimmer of cymbals and strings.
- Placement of a 1-inch tweeter at the rear of a Gran Coupe cabin contributes to high-frequency dispersion toward the rear seating area, where the sloped roofline of the fastback body style can otherwise limit treble diffusion.
- The 4-inch midrange driver handles the mid-frequency band, generally covering approximately 300 Hz to 5,000 Hz, which includes the fundamental tones of most instruments and the core intelligibility range of the human voice.
- At 4 inches, the cone diameter is small enough to maintain controlled directional dispersion at higher midrange frequencies while fitting within the constrained mounting depth typical of rear door panels or rear deck installations.
- The BMW 440i Gran Coupe rear location pairs a midrange driver with a separate tweeter rather than using a coaxial or full-range driver, indicating a component-style speaker arrangement at the rear position.
- In a component arrangement, the crossover network directs high-frequency signals to the 1-inch tweeter and mid-frequency signals to the 4-inch midrange, preventing each driver from reproducing frequencies outside the range suited to the physical size of the cone or dome.
- The 1-inch dome tweeter format, which is standard at that size, uses a lightweight diaphragm to move rapidly and reproduce short, fast sound waves with minimal distortion at the rear installation point.
- The 4-inch diameter limits low-frequency extension, meaning the rear midrange driver in the 440i Gran Coupe does not reproduce bass frequencies, which are typically handled by dedicated drivers elsewhere in the vehicle.
- Both the 1-inch and 4-inch rear speaker sizes remained consistent across the 2017 and 2018 model years of the BMW 440i Gran Coupe, indicating no change in the physical mounting dimensions of the rear speaker location between those 2 years.