Lexus LS400 Speaker Size

Front Door Panel Speaker

Rear Door Panel Speaker

Rear Deck Lid Speaker

Center Console Speaker

Lexus LS400 Speaker FAQ

Which speakers should I replace first in my Lexus LS400 for the biggest sound improvement?

Replace the front door panel speakers first. They handle most of your music's mid-range frequencies and vocals. The 5.25 inch front speakers (1993-2000) or 6.5 inch fronts (1990-1992) produce about 70% of what you actually hear while driving. Component speakers work better than coaxials here - separate tweeters and woofers typically deliver cleaner highs around 3-20 kHz. Look for speakers rated 50-75 watts RMS at 4 ohms. The Lexus LS400's factory amplifier usually pushes around 25-40 watts per channel, so you'll have headroom for upgrades later.

Can I install component speakers in all Lexus LS400 door locations?

Yes, but the setup varies by location. Front doors accept components easily - mount the woofer in the existing 5.25 or 6.5 inch opening and the tweeter in the door panel or A-pillar. Rear doors work too, though the 6.5 inch spaces might need minor modifications for some component sets. The crossover networks usually fit behind door panels. Consider 2-way components rated 4-8 ohms impedance to match your Lexus LS400's electrical system. Some installers prefer keeping rear doors as coaxials since... well, most passengers don't notice the difference back there.

What's the difference between the 8 inch center console and rear deck speakers in my Lexus LS400?

Location affects everything. The center console 8 inch (1990-1992 models) sits between front seats, so it reinforces bass around 80-250 Hz that you feel directly. Rear deck 8 inch speakers (1993-2000) fire upward through the package shelf, creating ambient bass that fills the cabin. Both can handle full-range or subwoofer duties, but the center position usually sounds tighter for bass. If your Lexus LS400 has both locations, the rear deck speakers might complement rather than compete. Power handling ranges from 40-100 watts typically. The center console placement disappeared after 1992, probably because... weight distribution or something.

Should I use 4 ohm or 8 ohm speakers in my Lexus LS400?

Stick with 4 ohm speakers. The Lexus LS400's factory amplifier expects 4 ohm loads for optimal power transfer. Using 8 ohm speakers cuts power output roughly in half - you might get 15-20 watts instead of 30-40 watts per channel. This matters especially for the front 5.25 inch or 6.5 inch speakers that need adequate power for clear midrange reproduction. The rear 6.5 inch and 8 inch speakers also benefit from proper impedance matching. Some aftermarket speakers offer dual voice coils or impedance switches, but... just go with 4 ohms unless you're planning a complete amplifier replacement.