2009 Audi A4 Speaker Sizes
The 2009 Audi A4 factory audio system features specific location allocations, where the dashboard accommodates a 1 inch speaker size alongside a 3 inch speaker size, while the center dash supports 2.5 inch and 3 inch units. Front door panels accept 1 inch, 5.25 inch, and 6.5 inch speakers, whereas rear door panels accommodate 1 inch and 6.5 inch speakers. Rear side panels support 5.25 inch speakers, and the rear deck lid accepts 3.5 inch and 8 inch units. Compatible speaker types for a replacement or upgrade include tweeters, midranges, full-range units, midbass drivers, and woofers.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Center Dash | 2.5 | Midrange |
|
| Center Dash | 3 | Midrange |
|
| Dashboard | 1 | Tweeter |
|
| Dashboard | 3 | Full-Range |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 5.25 | 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 |
|
| Rear Side Panel | 5.25 | Midbass / Full-Range |
|
2009 Audi A4 Speaker Replacement Summary
12
total positions
7
easy to replace
3
high priority
0
professional only
Replacement difficulty:
Low: 7 Medium: 5 High: 0Replacement priority:
High: 3 Medium: 8 Low: 12009 Audi A4 Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Double DIN | 7"×4" | 180×100 | Double size for modern multimedia systems with large touchscreens |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 2009 Audi A4 contains multiple speaker locations with varying sizes, suggesting a multi-component audio system design that separates frequency ranges across different speaker types.
- Tweeters at 1 inch are positioned in the dashboard, front door panels, and rear door panels, indicating a focus on high-frequency reproduction throughout the cabin.
- Midrange speakers at 2.5 inch and 3 inch are located in the center dash area, which may handle vocal and instrumental frequencies in the middle spectrum.
- The front and rear door panels accommodate both 5.25 inch and 6.5 inch speakers with midbass or full-range capabilities, offering flexibility in replacement options.
- An 8 inch woofer location exists in the rear deck lid, which would typically handle lower frequency bass reproduction.
- The presence of both midbass and full-range compatible locations in the doors suggests that replacements could either maintain the component separation or simplify to full-range speakers.
- Replacing the larger door speakers at 5.25 inch or 6.5 inch would likely produce more noticeable sound improvements compared to smaller tweeters or midrange units.
- The dashboard contains both 1 inch tweeter and 3 inch full-range locations, indicating multiple mounting points that serve different audio purposes.
- Component speaker systems with separate tweeters and midbass drivers would align with the factory configuration based on the tweeter and midbass location pairings.
- The double DIN radio opening provides standard aftermarket head unit compatibility without requiring dash modifications.