1991 Mercedes-Benz 350SD Speaker Sizes
The 1991 Mercedes-Benz 350SD speaker size chart details factory audio system specifications for replacement or aftermarket upgrade purposes. Information includes speaker locations within the vehicle, covering dashboard and rear deck lid positions. Data supports identification of compatible aftermarket speakers based on original equipment specifications and mounting configurations in the factory audio system.
As an Amazon Associate, we may earn a commission from purchases made through links marked. Read more in our disclaimer.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4 | Midrange |
|
| Rear Deck Lid | 5.25 | Midbass / Full-Range |
|
1991 Mercedes-Benz 350SD Speaker Replacement Summary
2
total positions
1
easy to replace
0
high priority
0
professional only
Replacement difficulty:
Low: 1 Medium: 1 High: 0Replacement priority:
High: 0 Medium: 2 Low: 01991 Mercedes-Benz 350SD 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 1991 Mercedes-Benz 350SD front speaker locations accommodate 4-inch midrange drivers in the dashboard positions, while the rear deck lid supports 5.25-inch speakers that can function as either midbass or full-range units depending on the system configuration.
- Dashboard speakers in this application are limited to midrange frequencies, suggesting a factory design that likely divided the frequency spectrum between front and rear locations rather than providing full-range coverage at each position.
- Rear deck lid speakers accept both midbass and full-range driver types at 5.25 inches, offering flexibility in system design based on whether the installer prioritizes low-frequency extension or broader frequency coverage from the rear positions.
- The single DIN radio specification indicates a standard opening that provides compatibility with aftermarket head units measuring approximately 7 by 2 inches in the mounting area.
- Replacing the factory dashboard midrange speakers could address frequency response limitations in the vocal and upper-bass ranges, particularly if the original drivers have degraded foam surrounds or paper cone material.
- The size difference between front and rear speakers creates a two-zone configuration where the smaller dashboard units handle middle frequencies while the larger rear deck speakers manage lower frequencies and potentially extended high-frequency response if full-range drivers are installed.