Mercedes-Benz GL320 Speaker Size

Front Door Panel Speaker

Rear Door Panel Speaker

Rear Roof Speaker

Center Dash Speaker

Cargo Area Speaker

Mercedes-Benz GL320 Speaker FAQ

What speakers should I replace first in my Mercedes-Benz GL320 for the biggest sound improvement?

Replace the 6.5-inch front door speakers first. These handle most of your mid-range frequencies and vocals - around 80Hz to 4kHz typically. Component speakers work better than coaxials here since the GL320 already has separate 1-inch tweeters in the front doors. Look for speakers rated 50-75 watts RMS with 4-ohm impedance. The front stage creates your stereo imaging, so this upgrade delivers the most noticeable improvement before touching anything else.

Can I install component speakers in the Mercedes-Benz GL320 rear doors?

Yes, but you'll need to work around the existing 1-inch tweeter. The rear door panel accepts 6.5-inch speakers, and there's already a tweeter location. Component systems might sound better since you can position the tweeter optimally. However, many people just install quality coaxials in the rear - the soundstage difference isn't as critical back there. If you go component, make sure the crossover frequency matches well with your front speakers, usually around 3-4kHz.

What's the deal with the 3.5-inch center dash speaker in the GL320?

That center speaker typically handles dialogue and center-channel information. It's probably running full-range up to around 8-10kHz before rolling off. Most aftermarket 3.5-inch speakers will fit, but check the mounting depth - Mercedes sometimes uses shallow mounting. Look for speakers with good midrange response between 200Hz-5kHz since that's where speech clarity lives. Some people disconnect it entirely, but it can help with vocal intelligibility if you choose a decent replacement.

Should I upgrade the 8-inch cargo area speaker in my Mercedes-Benz GL320?

Depends on what it's actually doing. If it's acting as a subwoofer, you might want something with better low-end extension - maybe down to 30-35Hz instead of the typical 50Hz rolloff. An 8-inch can handle decent bass in that cargo space, probably around 100-150 watts RMS. But if you're serious about bass, consider a proper subwoofer setup instead. The factory speaker location might not be optimal for bass response anyway.

Do I need to replace all the 1-inch tweeters in the GL320 at the same time?

Not necessarily. The front door tweeters matter most for imaging. Rear roof tweeters... they're more for ambiance than critical listening. If you're doing component speakers up front, you'll replace those tweeters anyway. The rear door tweeters can wait unless they're blown. Match impedance though - usually 4 ohms. And if you're keeping some factory tweeters, try to find replacements with similar sensitivity ratings, maybe within 2-3dB of each other.