Audi S7 C-Pillar Speaker Size
The Audi S7 C-Pillar accommodates a 3.5 inch speaker size across all listed model years. Midrange units are the compatible speaker type for the location. The specifications cover a range from 2013 to 2018.
| Year | Type | Size (inch) |
|---|---|---|
| 2018 | Midrange | 3.5 |
| 2017 | Midrange | 3.5 |
| 2016 | Midrange | 3.5 |
| 2015 | Midrange | 3.5 |
| 2014 | Midrange | 3.5 |
| 2013 | Midrange | 3.5 |
Speaker Types
| Type | Description |
|---|---|
| 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 C-pillar location in the Audi S7 sits at the rear of the cabin, positioned at the junction between the roofline and the rear quarter panel, placing speakers at ear level for rear passengers.
- A C-pillar mounting position typically involves a shallow, angled enclosure cavity within the pillar structure, which constrains both the depth and diameter of compatible speaker drivers.
- The 3.5 inch diameter specified across all model years in the Audi S7 C-pillar reflects the spatial constraints of the pillar cavity, where larger drivers would not physically fit within the structural envelope of the trim panel.
- A 3.5 inch driver operates with a relatively small cone surface area, which corresponds to a higher crossover point and limited low-frequency output compared to larger drivers in the same installation.
- In the C-pillar position, a 3.5 inch driver is oriented toward the rear seating area, making rear-cabin sound staging and fill a primary acoustic function of the location.
- Midrange speakers are designed to reproduce the frequency band approximately between 300 Hz and 5,000 Hz, covering vocals, most instruments, and the upper harmonics that define perceived audio clarity.
- A midrange driver in the C-pillar of the Audi S7 handles the frequency content most critical to rear-passenger speech intelligibility and tonal balance, as low-frequency reproduction is delegated to larger drivers elsewhere in the system.
- The 3.5 inch cone size suits midrange operation in the C-pillar because the driver mass and cone area are appropriate for the mid-band frequencies, allowing adequate excursion without the stiffness issues that would inhibit high-frequency response or the flapping that would distort low-frequency response.
- Midrange drivers are generally not designed to operate below 200 to 300 Hz, so the C-pillar in the Audi S7 functions as a supplemental staging location rather than a bass-reproduction point within a multi-driver system.
- The C-pillar angle in a fastback body style such as the Audi S7 is more steeply raked than in a sedan, which affects the directional axis of a speaker mounted within it and the degree to which the driver faces rear occupants directly.