Audi S8 Rear Deck Lid Speaker Size
The Audi S8 rear deck lid accommodates a 3.5 inch speaker size, along with 2 inch and 10 inch and 12 inch units. Compatible speaker types across these configurations include full-range, tweeter, and subwoofer. The specifications cover a range of years from 2007 to 2018.
| Year | Type | Size (inch) |
|---|---|---|
| 2018 | Full-Range | 3.5 |
| 2018 | Subwoofer | 10 |
| 2017 | Full-Range | 3.5 |
| 2017 | Subwoofer | 10 |
| 2016 | Full-Range | 3.5 |
| 2016 | Subwoofer | 10 |
| 2015 | Full-Range | 3.5 |
| 2015 | Subwoofer | 10 |
| 2014 | Full-Range | 3.5 |
| 2014 | Subwoofer | 10 |
| 2013 | Full-Range | 3.5 |
| 2013 | Subwoofer | 10 |
| 2009 | Tweeter | 2 |
| 2009 | Subwoofer | 12 |
| 2008 | Tweeter | 2 |
| 2008 | Subwoofer | 12 |
| 2007 | Tweeter | 2 |
| 2007 | Subwoofer | 12 |
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. |
| Subwoofer | A large driver for the lowest bass notes, typically from about 20 Hz to 120 Hz. It is usually installed in a separate enclosure and works alongside the other speakers. |
| Full-Range | A single driver that reproduces bass through treble without a separate crossover network. It is the simplest replacement option and is common in factory audio systems. |
Additional Notes
- The rear deck lid of the Audi S8 accommodates 2 distinct speaker sizes simultaneously across the listed model years, indicating the location contains multiple mounting positions sized for different acoustic roles within the same installation area.
- A 3.5 inch full-range speaker, as specified for the 2013-2018 model years, handles the full audible frequency spectrum from a single driver, relying on a small cone diameter to reproduce high-frequency detail while covering midrange frequencies with limited low-end extension.
- The 3.5 inch diameter places the full-range driver in a compact category suited to rear deck lid mounting, where available depth and baffle area are typically constrained by the lid's structural panels and hinge mechanisms.
- A full-range driver positioned at the rear deck lid radiates sound upward and rearward into the cabin, contributing to rear-fill coverage and spatial depth in the listening environment for occupants in the front and rear seating positions.
- The 10 inch subwoofer specified for the Audi S8 rear deck lid across the 2013-2018 years requires a significantly larger cutout and mounting depth than the co-located 3.5 inch driver, reflecting the need for a larger cone excursion area to reproduce low-frequency content below approximately 80-100 Hz.
- A subwoofer mounted in a rear deck lid location radiates low-frequency energy omnidirectionally, as bass wavelengths are long enough that the deck lid's interior-facing orientation does not substantially restrict the direction of low-frequency propagation through the cabin.
- The 2007-2009 model years specify a 2 inch tweeter rather than a full-range driver for the smaller mounting position, indicating the deck lid's secondary speaker location in those years was designated solely for high-frequency reproduction above approximately 2,000-5,000 Hz.
- A 2 inch tweeter, by virtue of its small diaphragm and lightweight voice coil, reproduces only upper-frequency content and produces a relatively directional dispersion pattern at high frequencies, making placement angle and aim significant factors for on-axis response to cabin occupants.
- The Audi S8 rear deck lid in the 2007-2009 years specifies a 12 inch subwoofer, a size larger than the 10 inch unit listed for 2013-2018, which corresponds to a greater cone surface area capable of moving more air volume and extending low-frequency output at higher displacement levels.
- The transition from a 12 inch subwoofer and 2 inch tweeter pairing in 2007-2009 to a 10 inch subwoofer and 3.5 inch full-range pairing in 2013-2018 reflects a change in the speaker configuration strategy for the deck lid location between the 2 generation variants covered in the specifications.
- Rear deck lid mounting positions in sedan body styles like the S8 are structurally integrated into the trunk lid panel, which affects available enclosure volume behind the mounting surface and the acoustic loading conditions experienced by a subwoofer driver at that location.