Mercedes-Benz 350SD Speaker Size
Speaker size, type, and location chart for Mercedes-Benz 350SD models from 1991 to 1991 production years.
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Dashboard Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 1991 | Midrange | 4 |
Rear Deck Lid Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 1991 | Midbass / Full-Range | 5.25 |
Mercedes-Benz 350SD Speaker FAQ
What speakers should I replace first in my Mercedes-Benz 350SD for better sound quality?
Replace the 5.25 inch rear deck speakers first. They handle most of your mid-range frequencies and bass response - around 80Hz to 4kHz typically. The dashboard 4 inch speakers mainly cover higher frequencies but won't impact overall sound as dramatically. Your Mercedes-Benz 350SD's rear deck location also provides better acoustic coupling with the cabin space. Look for speakers rated around 50-75 watts RMS with 4-ohm impedance to match the factory setup.
Can I install component speakers in the Mercedes-Benz 350SD rear deck location?
Yes, the rear deck accepts component systems since it supports multiple speaker types. Component speakers might actually work better here - you can mount the woofer in the deck and place the tweeter higher up. The crossover network typically handles frequencies around 3-4kHz split point. However, coaxial speakers are simpler to install and still provide good sound improvement over factory units. Consider your installation complexity versus sound quality goals.
What's the difference between coaxial and full-range speakers for the dashboard position?
Both types work in the 4 inch dashboard spot, but they're designed differently. Coaxial speakers have a separate tweeter mounted on the woofer cone - usually crossing over around 3-5kHz. Full-range speakers use a single cone to cover the entire frequency spectrum, though they might struggle with very high frequencies above 10kHz. In the Mercedes-Benz 350SD dashboard location, either should work fine since you're mainly getting upper midrange and treble support anyway.
How do I verify the correct impedance for Mercedes-Benz 350SD speaker replacements?
Check your existing speakers first - they're likely 4-ohm based on the era. You can measure with a multimeter across the terminals, though you'll get slightly higher readings than the actual impedance. Most aftermarket speakers come in 4-ohm versions anyway. Using 8-ohm speakers might reduce your volume output since the amplifier expects 4-ohm load. The Mercedes-Benz 350SD factory system probably puts out around 15-25 watts per channel, so matching impedance keeps everything working properly.