BMW 340i GT xDrive Rear Door Panel Speaker Size
The BMW 340i GT xDrive rear door panel accommodates a 1 inch speaker size and supports 4 inch speakers as well. Compatible types across both sizes include tweeter and midrange audio units within the system. 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 door panel location on the BMW 340i GT xDrive accommodates 2 distinct speaker sizes simultaneously, indicating a multi-driver configuration within the same door panel cavity.
- Door panel installations are typically surface-mounted or recessed into a dedicated speaker pocket, with depth clearance and baffle dimensions determining the maximum speaker basket size that can be fitted without mechanical interference.
- The 1-inch size in the rear door panel is associated exclusively with tweeter types, a driver diameter suited to high-frequency reproduction, generally covering the range above approximately 2,000 Hz to 20,000 Hz.
- Tweeters in rear door panel positions contribute to the high-frequency soundstage from the rear of the cabin, where placement height and angle relative to the listening position affect treble dispersion and imaging toward rear-seat occupants.
- The 4-inch size in the rear door panel is associated exclusively with midrange types, a driver diameter capable of handling vocal and mid-frequency content, generally spanning approximately 300 Hz to 5,000 Hz.
- A 4-inch midrange driver in a door panel location operates within the acoustic boundaries of the door cavity, where internal door volume and damping material influence low-midrange resonance and coloration.
- Midrange drivers at the rear door panel position reproduce frequencies central to speech intelligibility and instrument body, making the mechanical seal and mounting rigidity of the door panel relevant to clarity and distortion levels.
- The BMW 340i GT xDrive rear door panel supports both the 1-inch tweeter and 4-inch midrange across both the 2017 and 2018 model years, indicating consistent speaker sizing specifications between those 2 years.
- The coexistence of a tweeter and a midrange driver in the same door panel suggests a crossover network is part of the system, dividing the frequency signal so each driver receives only the range within its operational capacity.
- Door panel speaker mounting points are fixed by the manufacturer-designed grille and bracket positions, meaning aftermarket replacements must conform to the specified diameter to align with existing mounting holes and grille openings.