BMW 335is Rear Side Panel Speaker Size
The BMW 335is rear side panel accommodates 1 inch speakers, 0.75 inch units, and 4 inch units, with each speaker size representing a distinct fit for the location. Compatible types across these sizes include tweeters and midrange units. These specifications cover the 2011 to 2013 model years.
| Year | Type | Size (inch) |
|---|---|---|
| 2013 | Tweeter | 1 |
| 2013 | Tweeter | 0.75 |
| 2013 | Midrange | 4 |
| 2012 | Tweeter | 0.75 |
| 2012 | Midrange | 4 |
| 2011 | Tweeter | 1 |
| 2011 | Tweeter | 0.75 |
| 2011 | 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 335is positions speakers within the interior cabin walls flanking the rear seating area, placing drivers at ear level or slightly below for rear passengers.
- The rear side panel mounting orientation typically faces drivers inward toward the cabin, which affects dispersion patterns and the degree to which high-frequency output reaches listening positions directly.
- A 4 inch midrange driver appears across the listed model years for the BMW 335is rear side panel, sized to handle the middle portion of the audible frequency spectrum, generally spanning roughly 250 Hz to 5 kHz.
- At the rear side panel location, a 4 inch midrange driver reproduces vocals, instruments, and upper-bass presence without extending into the lowest bass frequencies, which require larger cone surface area to displace sufficient air.
- The 4 inch diameter constrains low-frequency extension relative to larger woofer formats, meaning the rear side panel placement does not contribute to subwoofer or deep bass reproduction in the 335is.
- Tweeters of both 1 inch and 0.75 inch diameters are listed as compatible types for the rear side panel across the 2011 and 2013 model years, while the 2012 year lists only the 0.75 inch tweeter alongside the 4 inch midrange.
- Tweeters in the 1 inch and 0.75 inch range reproduce high frequencies, typically from around 2 kHz up to 20 kHz, covering the upper harmonics, air, and detail in audio content.
- A 1 inch tweeter dome generally moves more air than a 0.75 inch dome, which can influence output level and high-frequency dispersion at the rear side panel position within the cabin.
- A 0.75 inch tweeter has a smaller diaphragm, which can extend upper frequency response further than larger dome formats, though with a narrower dispersion pattern at those extreme high frequencies.
- Positioning tweeters within a rear side panel rather than in a dedicated A-pillar or sail panel mount places the high-frequency source closer to the rear cabin space, affecting the spatial imaging perceived by rear passengers.
- The simultaneous listing of both 1 inch and 0.75 inch tweeter sizes for the 2011 and 2013 BMW 335is rear side panel indicates the mounting cavity accommodates either diameter format rather than a single fixed size.
- The combination of a midrange driver and a tweeter at the rear side panel location reflects a multi-driver approach where frequency reproduction is divided between 2 discrete drivers rather than handled by a single full-range unit.