Geo Prizm Speaker Size

Rear Deck Lid Speaker

Front Door Panel Speaker

Dashboard Speaker

Geo Prizm Speaker FAQ

Which speakers should I replace first in my Geo Prizm for the biggest sound improvement?

Replace the front door panel speakers first - they handle most of your midrange frequencies and vocals. The 5.25-inch location in the Geo Prizm gives you decent power handling, usually around 25-50 watts RMS. Front speakers sit closer to your ears. Better imaging that way. Rear deck speakers can wait since they mostly fill in background sound. Dashboard speakers? Those 4-inch units probably don't contribute much below 200 Hz anyway.

Can I put component speakers in all locations of my Geo Prizm?

The rear deck and front doors accept component speakers, but dashboard mounting might limit your tweeter placement options. Component systems typically need 2-3 inches clearance for proper tweeter positioning. Front door components work well - you can mount tweeters in the sail panels or A-pillars. Rear deck components give you flexibility since there's usually space behind the deck. Just verify your amplifier can handle the impedance load - most aftermarket components run 4 ohms.

What's the difference between the 5x7 and 6.5-inch rear speakers in the Geo Prizm?

The 5x7 speakers have more surface area - roughly 27 square inches versus 21 for the 6.5-inch round speakers. More cone area usually means better bass response below 100 Hz. But the 6.5-inch speakers often handle higher power levels, sometimes up to 75 watts RMS compared to 50 watts for oval speakers. Round speakers also have better excursion characteristics. Less cone flex at higher volumes. The mounting depth requirements are similar though - both need about 2.5 inches clearance.

Should I use coaxial or full-range speakers in my Geo Prizm dashboard?

Coaxial speakers work better for the 4-inch dashboard location since they include a tweeter. Full-range speakers rely on the cone to reproduce high frequencies - not ideal for a 4-inch driver. The tweeter in coaxials handles frequencies above 3-4 kHz more efficiently. Your Geo Prizm dashboard probably doesn't have much depth anyway, maybe 2 inches maximum. Coaxials are typically shallower than component setups. Power handling isn't critical here since these speakers mainly supplement the fronts.

What impedance should I look for when replacing Geo Prizm speakers?

Most factory Geo Prizm speakers run 4 ohms, so stick with 4-ohm replacements. Your head unit expects this load. Going to 2 ohms might overload the amplifier - especially if you're running multiple speakers per channel. 8-ohm speakers will work but you'll lose about half the power output. Some aftermarket speakers come in dual voice coil configurations. Those give you wiring options but aren't necessary for basic replacement. Check your amplifier specs first - some older units prefer 8-ohm loads.