Audi A3 Quattro Rear Deck Lid Speaker Size
The Audi A3 Quattro rear deck lid accommodates 3.5 inch speakers and supports an 8 inch speaker size. Compatible types across both sizes include full-range units and woofers. The specifications cover the 2015 to 2018 model range.
| Year | Type | Size (inch) |
|---|---|---|
| 2018 | Full-Range | 3.5 |
| 2018 | Woofer | 8 |
| 2017 | Full-Range | 3.5 |
| 2017 | Woofer | 8 |
| 2016 | Full-Range | 3.5 |
| 2016 | Woofer | 8 |
| 2015 | Full-Range | 3.5 |
| 2015 | Woofer | 8 |
Speaker Types
| Type | Description |
|---|---|
| Woofer | A larger driver for low frequencies, typically from about 40 Hz up to 1,000 Hz. It delivers most of the bass and lower midrange in a door or panel speaker system. |
| 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 A3 Quattro is a horizontal surface positioned at the base of the rear window, above the trunk cavity, placing mounted speakers in a rearward-facing and upward-radiating orientation relative to the cabin.
- A 3.5 inch driver in the rear deck lid occupies a compact mounting cutout, requiring minimal depth clearance behind the panel, which is relevant given the limited space typically available between the deck lid surface and the trunk structure beneath.
- A full-range speaker type covers the audible spectrum from low-mid frequencies through high frequencies within a single driver, making the 3.5 inch full-range units in the Audi A3 Quattro rear deck lid responsible for reproducing a broad frequency band from that rear position.
- At 3.5 inches, the cone area is relatively small, which corresponds to a reduced capacity for moving air at low frequencies and a natural emphasis on midrange and upper-frequency reproduction in the deck lid location.
- An 8 inch woofer requires a significantly larger mounting cutout and greater behind-panel depth than a 3.5 inch driver, meaning the rear deck lid of the Audi A3 Quattro must accommodate both a large-diameter frame and the additional magnet and voice coil assembly depth of a woofer.
- A woofer is a driver type designed to reproduce low frequencies, typically from approximately 40 Hz to 500 Hz, concentrating bass and upper-bass reproduction at the rear deck lid position in the Audi A3 Quattro.
- At 8 inches, the cone surface area is substantially larger than the 3.5 inch driver, enabling greater air displacement and the reproduction of lower-frequency content with more authority from the deck lid mounting location.
- The rear deck lid position places the 8 inch woofer at a distance from the front listening positions, which affects the time alignment and phase relationship of low-frequency content relative to speakers mounted elsewhere in the cabin.
- The simultaneous fitment of both a 3.5 inch full-range and an 8 inch woofer at the rear deck lid indicates the location contains multiple distinct mounting positions, each sized to accommodate a different driver diameter.
- The horizontal, upward-radiating orientation of rear deck lid speakers causes sound waves to reflect off the rear window glass before reaching the cabin, influencing the dispersion pattern of both the full-range and woofer drivers mounted there.