Infiniti M30 Speaker Size

Front Door Panel Speaker

Rear Deck Lid Speaker

Infiniti M30 Speaker FAQ

What speakers should I replace first in my Infiniti M30?

Replace the front door panel speakers first. The 4-inch coaxials in the front doors handle most of your vocal frequencies and midrange detail. You'll notice the biggest improvement here since these speakers sit closer to your ears. The rear deck 6x9s can wait - they mostly fill in bass and ambient sound. Front speakers typically see more wear anyway from door vibrations.

Can I upgrade from coaxial to component speakers in my Infiniti M30 front doors?

Yes, the front door panels already support both coaxial and component configurations. Components will give you better imaging since you can position the tweeter separately from the woofer. You might need to mount the crossover somewhere accessible though. The 4-inch size limits your power handling to maybe 50-60 watts RMS max, so don't expect huge volume gains.

Why does my Infiniti M30 have different speaker types in front vs rear?

The rear deck lid speakers can be coaxial, full-range, or triaxial because that location is less critical for stereo imaging. Rear speakers mainly provide fill and ambiance. The front doors need more precise sound reproduction for vocals and instruments, so they typically use coaxials or components. The 6x9 rear speakers also have more cone area for better bass response than the 4-inch fronts.

What's the difference between triaxial and coaxial speakers for my M30's rear deck?

Triaxial speakers add a small midrange driver between the woofer and tweeter. This can help with vocal clarity from the rear. Coaxials just have the tweeter mounted over the woofer. Full-range speakers have no separate tweeter at all - just one cone trying to handle everything. For rear fill in the Infiniti M30, coaxials usually work fine since you're not relying on them for primary imaging.

Will 6x9 speakers fit properly in my Infiniti M30 rear deck?

The 6x9 size should fit the factory mounting points in the rear deck lid. Check your mounting depth though - some aftermarket 6x9s are deeper than stock. You'll want speakers around 4 ohms impedance to match your factory amp output. Power handling around 40-80 watts RMS should work well. The oval shape gives you more cone area than round speakers would in that space.