Infiniti M37 Speaker Size

Front Door Panel Speaker

Rear Deck Center Speaker

Center Dash Speaker

Headrest Speaker

Rear Door Panel Speaker

Rear Deck Lid Speaker

Infiniti M37 Speaker FAQ

Which speakers should I replace first in my Infiniti M37 for the biggest sound improvement?

Replace the front door 6x9 inch component speakers first. These handle most of your music's frequency range and sit closest to your ears. The factory units probably run around 25-40 watts RMS with basic paper cones. Upgrading to quality components with silk dome tweeters and polypropylene woofers will dramatically improve clarity and bass response. The front 3 inch midrange speakers are secondary priority since they mainly fill in vocal frequencies that the 6x9s already cover well.

Can I use coaxial speakers instead of component speakers in the front doors of my Infiniti M37?

Yes, coaxial speakers will fit the 6x9 inch front door locations. However, you'll lose some sound staging precision since coaxials combine the tweeter and woofer in one unit. The factory setup uses separate 1 inch tweeters and 6x9 components for better frequency separation. If you're going coaxial route, look for models with pivoting tweeters rated around 50-75 watts RMS. The impedance should match factory specs, typically 4 ohms. Component systems still offer superior imaging though... especially in luxury vehicles like the M37 where positioning matters.

What's the deal with all the 3 inch speakers in my Infiniti M37 - do they all serve the same purpose?

Not exactly. You've got 3 inch speakers in three locations: front door midrange, rear deck, and center dash. The front door midrange works with the component system to handle vocals around 200-4000 Hz. The rear deck 3 inch provides ambient fill, usually running full-range but limited by size. Center dash speaker focuses on dialogue and center imaging. Each location has different power requirements and crossover points. The front midrange probably sees the most power since it's part of the main component system.

Should I replace the 2 inch headrest speakers in my Infiniti M37?

Maybe not immediately. These tiny full-range speakers mainly provide personal audio for rear passengers or surround effects. They're limited to maybe 10-15 watts and can't reproduce much below 150 Hz anyway. Focus your budget on the main speakers first - the 6x9 front components and 6.5 inch rear doors. The headrest speakers are more about convenience than serious audio improvement. Unless you're building a complete system overhaul, leave them stock for now.

How do I verify if my Infiniti M37 has the factory subwoofer before upgrading speakers?

Check the rear deck center area for a 10 inch subwoofer. Not all M37 models came with this factory sub. If present, it's probably powered by the premium audio system amplifier. You can usually see the speaker grille or feel for a large round cutout in the rear deck. The presence of this sub affects your upgrade strategy since it handles bass below 80-100 Hz. Without it, you'll want aftermarket speakers with stronger low-end response. The factory sub is decent but... well, factory. Aftermarket alternatives typically offer more control and power.