BMW 735i Speaker Size

Front Door Panel Speaker

Rear Door Panel Speaker

Front Kick Panel Speaker

Rear Deck Lid Speaker

BMW 735i Speaker FAQ

Which speakers should I replace first in my BMW 735i for maximum sound improvement?

Replace the front speakers first. Front door panels or kick panels handle most of your stereo imaging and vocal clarity. The BMW 735i front locations get the most listening time anyway. Rear speakers mainly fill in ambient sound - they're secondary for actual music quality. Start with 6x8 inch speakers if you have door panel mounts, or 4x6 inch for kick panel setups. You'll hear the biggest difference immediately since front staging controls everything you actually notice while driving.

Can I install component speakers in all BMW 735i speaker locations?

Most locations accept components, but installation complexity varies significantly. Door panels work best for component systems - you can mount tweeters in the upper door area or dashboard. Kick panel locations might be trickier for separate tweeters since space is limited. Rear deck lid positions usually handle components fine too. The 5.25 inch rear deck setup gives you decent tweeter placement options. However, you'll need to verify mounting depth and tweeter placement before committing to components everywhere. Sometimes coaxial speakers make more sense for rear positions.

What power handling should I look for in BMW 735i replacement speakers?

Target 50-75 watts RMS for most positions. The factory BMW 735i electrical system can typically support aftermarket speakers in this range without amplifier upgrades. Peak power ratings around 150-200 watts work well too, but RMS matters more for daily driving. Your 6x8 inch speakers can usually handle slightly more power than 4x6 or 5.25 inch sizes. Don't exceed 100 watts RMS unless you're planning amplifier installations. The factory head unit probably outputs 15-25 watts per channel, so even modest aftermarket speakers will be underutilized without additional amplification.

Are full-range speakers worth considering for the BMW 735i over coaxial options?

Full-range speakers might work in rear positions where treble response isn't critical. They typically cost less than coaxial designs and can sound... adequate for background fill. But front positions really benefit from coaxial speakers with separate tweeters. The BMW 735i cabin acoustics need proper high-frequency dispersion up front. Full-range drivers struggle with treble above 8kHz or so. Your kick panels or door panels deserve better frequency response than single-cone designs provide. Save full-range speakers for rear deck applications where they won't hurt overall sound staging.

What impedance should BMW 735i replacement speakers have?

Stick with 4-ohm speakers for best compatibility. The factory BMW 735i amplifier or head unit expects 4-ohm loads typically. Going to 8-ohm speakers reduces power output - you'll get maybe half the available watts. 2-ohm speakers might draw too much current and stress the electrical system. Most quality aftermarket speakers come in 4-ohm configurations anyway. This applies to all positions - front doors, kick panels, rear deck, wherever you're installing. Your amplifier matching becomes much simpler when everything stays at 4 ohms throughout the BMW 735i system.