2009 Audi A3 Speaker Sizes
A speaker size chart for the 2009 Audi A3 provides factory speaker specifications and locations throughout the vehicle. Information covers replacement speakers in the front door panel, rear door panel, a-pillar, and cargo area positions. Data assists with aftermarket audio system upgrades by detailing the original equipment sizes installed at each location within the factory audio configuration.
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| Location | Size | Type | Notes |
|---|---|---|---|
| A-Pillar | 1 | Tweeter |
|
| Cargo Area | 8 | Subwoofer |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Door Panel | 1 | Tweeter |
|
| Rear Door Panel | 6.5 | Midbass / Full-Range |
|
2009 Audi A3 Speaker Replacement Summary
5
total positions
4
easy to replace
2
high priority
1
professional only
Replacement difficulty:
Low: 4 Medium: 0 High: 1Replacement priority:
High: 2 Medium: 2 Low: 12009 Audi A3 Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN or Double DIN | 7"×2" or 7"×4" | 180×50 or 180×100 | Vehicle supports both radio sizes |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 2009 Audi A3 features a multi-speaker configuration with separate tweeters and larger drivers for different frequency ranges. The 1-inch tweeters in the A-pillar and rear door panels handle high frequencies, while the 6.5-inch drivers in both front and rear door panels can accommodate either midbass or full-range speakers depending on system design preferences.
- Front door panel speakers typically receive priority in aftermarket replacement projects since they handle much of the mid-range and lower frequencies that contribute to overall sound quality. The 6.5-inch openings provide adequate space for components with stronger magnets and improved cone materials compared to factory installations.
- The separation of tweeters from larger drivers suggests a component-style approach rather than coaxial speakers. This design allows for better frequency distribution and potentially improved staging when replacement speakers maintain similar positioning.
- The cargo area subwoofer location with an 8-inch opening provides dedicated low-frequency reproduction. Aftermarket subwoofers in this position may offer enhanced bass response compared to factory units, particularly when paired with appropriate amplification.
- Radio replacement options include both single DIN and double DIN head units, giving flexibility for upgrading source components. Double DIN units typically offer larger displays and additional features that may integrate with upgraded speaker systems.
- The tweeter positions in the A-pillar tend to direct high frequencies toward the listening area more effectively than door-mounted locations alone. This placement can contribute to perceived soundstage width when properly matched with replacement door speakers.