1999 Audi A4 Speaker Sizes
The 1999 Audi A4 factory audio system features specific locations for audio components. Front door panel and rear door panel locations accept 1 inch units. Front door panel and rear deck lid locations accommodate 5.25 inch and 6.5 inch speakers, establishing a baseline 8 inch speaker size constraint context. Compatible speaker types for replacement and upgrade include tweeter, midbass, and full-range units.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 1 | Tweeter |
|
| Front Door Panel | 5.25 | Midbass / Full-Range |
|
| Rear Deck Lid | 6.5 | Midbass / Full-Range |
|
| Rear Door Panel | 1 | Tweeter |
|
1999 Audi A4 Speaker Replacement Summary
4
total positions
4
easy to replace
2
high priority
0
professional only
Replacement difficulty:
Low: 4 Medium: 0 High: 0Replacement priority:
High: 2 Medium: 2 Low: 01999 Audi A4 Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN | 7"×2" | 180×50 | Standard size for basic car radios with small display or no display |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The 1999 Audi A4 features a component speaker configuration in the front doors, with separate 1 inch tweeters and 5.25 inch midbass or full-range drivers occupying distinct mounting locations within each door panel.
- Rear audio coverage utilizes 1 inch tweeters in the door panels paired with 6.5 inch midbass or full-range speakers in the deck lid, creating a four-way speaker arrangement across the cabin.
- Component speaker systems may offer tonal advantages over coaxial designs in this application, as the factory layout already provides dedicated tweeter mounting positions that can accommodate aftermarket components without additional modifications.
- The 6.5 inch speakers in the rear deck lid location typically benefit from larger cone area compared to the 5.25 inch front drivers, potentially contributing to lower frequency extension from the rear channels.
- Aftermarket speaker selection could prioritize component sets for the front doors to maintain the separated tweeter and woofer architecture, while the rear positions might accommodate either component or coaxial replacements depending on installation preferences.
- The single DIN radio opening provides standard head unit replacement options, which may influence speaker upgrade planning if source unit improvements are considered alongside speaker changes.
- Tweeter replacement in both front and rear door panels might address high-frequency clarity concerns, particularly if the factory silk or paper dome units have deteriorated over time.
- The differing woofer sizes between front and rear suggest that tonal balance across the soundstage may require attention to sensitivity ratings when selecting replacement speakers to avoid output mismatches.