Infiniti M35h Speaker Size

Front Door Panel Speaker

Rear Deck Center Speaker

Center Dash Speaker

Headrest Speaker

Rear Door Panel Speaker

Rear Deck Lid Speaker

Infiniti M35h Speaker FAQ

Which speakers should I upgrade first in my Infiniti M35h for the biggest sound improvement?

Start with the front door 6x9 inch speakers and the rear door 6.5 inch panels. These handle most of your music's frequency range and sit closest to your listening position. The front door components already separate midrange and tweeter duties, so replacing both the 3 inch midrange and 1 inch tweeter together maintains that advantage. You'll want speakers rated around 50-75 watts RMS with 4-ohm impedance to match the factory setup. The 10 inch rear deck subwoofer can wait unless you're specifically missing deep bass below 80 Hz.

Can I replace the component speakers in my Infiniti M35h with coaxial speakers instead?

Yes, but you'll lose some sound staging precision. The front door uses separate 3 inch midrange and 1 inch tweeter components, which allows better frequency separation and positioning. Installing a coaxial speaker means cramming both drivers into one location. However, a quality 6x9 inch coaxial in the front door might actually sound better than cheap components. Look for coaxials with silk dome tweeters and frequency response from 45 Hz to 20 kHz. The installation becomes simpler since you're only dealing with one speaker connection instead of separate crossover wiring.

What's the purpose of having so many small 3 inch speakers throughout the Infiniti M35h?

Fill and ambiance, mostly. The center dash 3 inch handles vocal clarity and dialog from your audio system's center channel processing. Rear deck lid 3 inch speakers create surround effects and fill in gaps when rear passengers are present. These smaller drivers typically operate in the 200 Hz to 8 kHz range, bridging the gap between your main speakers and tweeters. Don't expect much bass from them - they're more about creating an immersive soundfield. Upgrading them provides subtle improvements rather than dramatic changes to your overall sound quality.

Should I worry about the 2 inch headrest speakers when upgrading my Infiniti M35h audio system?

Probably not a priority. Those tiny headrest speakers mainly provide high-frequency fill for rear seat passengers and might handle some surround sound processing. They're limited by size to frequencies above 500 Hz and power handling around 10-15 watts maximum. Replacement options are fairly limited anyway. Focus your budget on the larger door speakers first. The headrest speakers will benefit from a cleaner signal once you upgrade your main components, even without direct replacement.

How do I know if my Infiniti M35h speakers are component or coaxial when ordering replacements?

Check the wiring at each location. Component setups have separate connections for midrange and tweeter - you'll see multiple wire pairs going to different drivers. The front doors definitely use components based on the separate 3 inch midrange and 1 inch tweeter listings. Rear doors show as component/coaxial/full-range which suggests they might vary by trim level or the factory used different configurations. Measure your existing speakers and count the drivers. One driver with a small tweeter mounted on top means coaxial. Separate drivers in different locations means component system.