2018 Audi S4 Speaker Sizes
The 2018 Audi S4 factory audio system features specific mounting locations. The a-pillar, center dash, dashboard, and rear door panel accept 1 inch speakers. Furthermore, center dash units accommodate 2.5 inch speakers, while rear deck lid and front door panel locations support 3.5 inch units. Front door panel and rear door panel areas accept 6.5 inch speakers, and the rear deck lid accommodates an 8 inch speaker size. Compatible speaker types for a replacement and upgrade include tweeter, midrange, full-range, midbass, and woofer components.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| A-Pillar | 1 | Tweeter |
|
| Center Dash | 1 | Tweeter |
|
| Center Dash | 2.5 | Midrange |
|
| Dashboard | 1 | Tweeter |
|
| Front Door Panel | 3.5 | Midrange |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Deck Lid | 3.5 | Full-Range |
|
| Rear Deck Lid | 8 | Woofer |
|
| Rear Door Panel | 1 | Tweeter |
|
| Rear Door Panel | 6.5 | Midbass / Full-Range |
|
2018 Audi S4 Speaker Replacement Summary
10
total positions
6
easy to replace
2
high priority
1
professional only
Replacement difficulty:
Low: 6 Medium: 3 High: 1Replacement priority:
High: 2 Medium: 7 Low: 1Additional Notes
- The 2018 Audi S4 features a multi-way speaker configuration with dedicated drivers for specific frequency ranges, suggesting a factory audio system designed around component separation rather than relying solely on full-range speakers.
- Tweeters measuring 1 inch occupy four distinct locations throughout the cabin, potentially providing high-frequency dispersion from the A-pillars, center dash area, standard dashboard position, and rear door panels.
- Midrange drivers appear in two sizes within the system: a 2.5 inch unit in the center dash and 3.5 inch units in the front door panels, which may handle vocal and instrumental frequencies in the critical midband spectrum.
- The front and rear door panels each accommodate 6.5 inch drivers compatible with either midbass or full-range applications, offering flexibility for aftermarket upgrades depending on whether the installer retains the factory tweeter network or implements a different crossover strategy.
- Two speaker locations in the rear deck lid accept different sizes, with a 3.5 inch full-range position and an 8 inch woofer location, the latter likely contributing lower frequency extension for rear passengers or overall cabin bass response.
- Replacement priority might focus initially on the 6.5 inch door panel positions, as these larger drivers typically handle the majority of audible content and often show the most substantial improvement potential when upgraded from factory components.
- The presence of dedicated woofer and tweeter locations suggests that component speaker sets with external crossovers may integrate more seamlessly than coaxial designs, preserving the intended frequency distribution across the cabin.
- Sound improvement from aftermarket speakers would likely depend on whether replacements maintain compatibility with factory amplification and crossover points, as the multiple driver sizes indicate a system engineered with specific frequency divisions.