Mazda MX-3 Speaker Size

Front Door Panel Speaker

Rear Deck Lid Speaker

Mazda MX-3 Speaker FAQ

What speakers should I upgrade first in my Mazda MX-3?

Replace the front door panel 6.5 inch speakers first. They handle most of your midrange frequencies and vocals. The front speakers typically get 60-80% of your audio signal compared to rear deck speakers. Your MX-3's front doors probably have better acoustic properties than the rear deck lid too. Start with component speakers if your budget allows - around 50-75 watts RMS should work well. The rear 5.25 inch speakers can wait since they mainly provide fill sound.

Can I install component speakers in both front and rear locations of my MX-3?

Yes, but prioritize the front door panels. Component speakers separate tweeters from woofers, giving you better imaging and soundstage. Your Mazda MX-3 front doors likely have more space for tweeter mounting compared to the rear deck lid. Most people find rear components unnecessary unless you're building a serious sound system. The rear deck lid might need custom tweeter mounting - not always straightforward. Coaxial speakers work fine for rear fill in most cases.

What's the difference between coaxial and full-range speakers for my MX-3's rear deck?

Coaxial speakers have a separate tweeter mounted on the woofer cone. Full-range speakers try to reproduce all frequencies with one driver - no separate tweeter. Coaxials generally sound better because the tweeter handles highs properly. Around 4000-20000 Hz gets cleaner reproduction. Full-range speakers might struggle with crisp highs but they're often cheaper. Your Mazda MX-3's rear deck lid placement means either type will work, though coaxials probably give you better overall frequency response.

How many watts can the Mazda MX-3 factory electrical system handle for speaker upgrades?

The factory system probably supports 25-40 watts per channel safely. You can install speakers rated up to 75-100 watts RMS without electrical issues - they'll just receive less power. Higher wattage speakers often have better build quality anyway. The 6.5 inch front speakers might handle more power than the 5.25 inch rears due to cone area. If you want serious power, plan on adding an aftermarket amplifier. The alternator output should handle modest speaker upgrades without problems.

Should I match impedance when replacing MX-3 speakers?

Stick with 4-ohm speakers typically. Most car audio systems expect 4-ohm loads, including your Mazda MX-3. Using 8-ohm speakers reduces power output - you might lose 30-50% of available watts. Lower impedance like 2-ohms can stress the head unit's amplifier section. The factory radio wasn't designed for that kind of load. Component speakers usually come in 4-ohm configurations anyway. Check your replacement speakers' specifications before buying - impedance should be clearly marked.