BMW 340i GT xDrive Rear Side Panel Speaker Size
The BMW 340i GT xDrive rear side panel accommodates 1 inch speaker size and 4 inch speakers. Compatible types for the location include tweeters and midrange units. The specifications cover the 2017 to 2018 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 side panel location in the BMW 340i GT xDrive accommodates 2 distinct speaker sizes, specifically 1 inch and 4 inch, each assigned to a different driver type.
- A 1-inch tweeter installed in the rear side panel operates in the high-frequency range, typically covering approximately 2 kHz and above, reproducing detail, air, and transient clarity within the rear cabin space.
- The rear side panel position places a tweeter at a lateral angle relative to rear seat occupants, which affects the directional arrival of high-frequency content since tweeters are highly directional at short wavelengths.
- A 4-inch midrange driver in the rear side panel handles the mid-frequency band, generally spanning roughly 300 Hz to 5 kHz, covering vocals, instruments, and the core intelligibility range of audio content.
- At 4 inches, the cone surface area is sufficient to move enough air for accurate midrange reproduction while remaining compact enough to fit within the constrained depth and width typical of a side panel cavity.
- The pairing of a 1-inch tweeter with a 4-inch midrange in the BMW 340i GT xDrive rear side panel indicates a 2-way speaker arrangement at this location, with each driver covering a separate portion of the audible frequency spectrum.
- Side panel mounting, as opposed to door or rear deck mounting, positions the drivers along the lower rear flanks of the cabin, influencing the soundstage height and lateral dispersion characteristics perceived by rear seat occupants.
- A 4-inch midrange driver does not extend meaningfully into low bass frequencies, so the rear side panel configuration relies on other locations within the vehicle to handle sub-bass and bass reproduction.
- The 1-inch form factor for the tweeter is a standard size that fits within shallow mounting depths, which is a relevant constraint in rear side panel installations where structural elements limit available enclosure space.