Porsche 928 Speaker Size

Front Door Panel Speaker

Rear Door Panel Speaker

Porsche 928 Speaker FAQ

Should I upgrade the 4-inch front speakers or 6.5-inch rear speakers first in my Porsche 928?

Start with the 6.5-inch rear door panel speakers. They handle more power - typically 60-80 watts RMS versus the front 4-inch speakers at 40-50 watts. The larger cone area moves more air for better bass response. Your Porsche 928 uses the rear speakers as the primary sound source, so you'll notice immediate improvement in overall volume and clarity. The 4-inch fronts mainly handle mid-range frequencies anyway.

What's the difference between coaxial and component speakers for the Porsche 928 front doors?

Component speakers separate the tweeter from the woofer - usually sounds cleaner but needs more installation work. The 4-inch front location in the Porsche 928 might not have dedicated tweeter mounting spots. Coaxial speakers combine everything in one unit, easier install. For 4-inch speakers, the difference isn't as dramatic as with larger sizes. If you're keeping the factory amplifier, coaxials probably make more sense. Components really shine when you add aftermarket amplification.

Can I install 6.75-inch speakers instead of 6.5-inch in the Porsche 928 rear doors?

Maybe, but measure first. The Porsche 928 rear door panels have specific mounting depth - usually around 2.5-3 inches. Most 6.75-inch speakers need similar depth but check the magnet clearance. The extra 0.25 inches might cause interference with the window mechanism. Stick with 6.5-inch unless you've confirmed fitment. The performance gain from 6.75-inch over 6.5-inch isn't worth potential installation headaches.

What impedance should I choose for Porsche 928 speaker replacements?

4-ohm speakers work best with the Porsche 928 factory system. The original amplifier expects this load - usually puts out around 25-30 watts per channel. 8-ohm speakers will play quieter, maybe 15-20 watts. 2-ohm speakers might overheat the amp, though some people run them without issues. If you're planning an aftermarket amplifier later, get 4-ohm speakers anyway. They're more versatile for future upgrades.

Do full-range speakers sound better than coaxials in the Porsche 928 rear doors?

Full-range speakers focus on mid-range frequencies - roughly 80Hz to 8kHz. They often sound more natural for vocals and instruments. Coaxials try to cover the full spectrum with separate tweeters, but in a 6.5-inch package, the tweeter placement isn't ideal. For the Porsche 928's acoustic environment, full-range might actually sound more balanced. The rear location doesn't need extreme high-frequency extension anyway. Test both if possible, but full-range speakers tend to be more forgiving of the factory amplifier's limitations.