2009 Mercedes-Benz SL550 Speaker Sizes
The 2009 Mercedes-Benz SL550 speaker size chart provides factory audio system specifications for replacement or aftermarket upgrade purposes. Information includes speaker locations in front door panels and rear door panels, with details on factory sizes and compatible aftermarket options for each position within the vehicle audio system.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Door Panel | 3.5 | Midrange |
|
2009 Mercedes-Benz SL550 Speaker Replacement Summary
2
total positions
2
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 2 Medium: 0 High: 0Replacement priority:
High: 1 Medium: 1 Low: 02009 Mercedes-Benz SL550 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 rear door panels in the 2009 Mercedes-Benz SL550 accommodate 3.5 inch midrange speakers, which typically handle vocal frequencies and mid-spectrum audio content rather than bass reproduction.
- Front door panels accept 6.5 inch speakers that can function as either midbass drivers or full-range units, with midbass configurations generally requiring separate tweeters for high-frequency response.
- Replacing the front speakers first would likely produce more noticeable acoustic improvements, as the larger 6.5 inch size handles a broader frequency range and delivers greater output capability compared to the smaller rear units.
- The 3.5 inch rear midrange speakers may contribute to ambient fill and passenger area coverage in the 2009 Mercedes-Benz SL550, though their limited cone area restricts low-frequency extension.
- A component speaker system with separate tweeters mounted in the front doors could maximize the potential of the 6.5 inch locations, while coaxial full-range speakers offer simpler installation with integrated high-frequency drivers.
- The double DIN radio opening suggests potential for aftermarket head unit upgrades that might include enhanced amplification or signal processing to drive replacement speakers more effectively.