Lexus GS300 Speaker Size

Rear Deck Lid Speaker

Front Door Panel Speaker

Rear Door Panel Speaker

Lexus GS300 Speaker FAQ

What speakers should I upgrade first in my Lexus GS300 for the biggest sound improvement?

Start with the front door panel 6.5 inch speakers. These handle most of your music's midrange and vocal frequencies. Component speakers work better here than coaxials - you get separate tweeters and woofers with a crossover network. Look for speakers rated around 50-75 watts RMS with 4-ohm impedance. The Lexus GS300 front doors have decent mounting depth, so most aftermarket 6.5 inch components should fit without major modifications.

Can I replace the rear deck subwoofer with a regular speaker in my Lexus GS300?

You could install a full-range speaker in the rear deck location, but it's not ideal. The 10 inch opening was designed for low-frequency output. Installing a full-range speaker there might create weird imaging - sounds coming from behind you instead of the front soundstage. If your rear deck subwoofer is blown, consider a replacement subwoofer rated for 100-150 watts. The mounting depth varies... some aftermarket 10 inch subs need more space than the factory unit provided.

Why does my Lexus GS300 have different rear deck speaker sizes depending on the generation?

Earlier GS300 models used 8 inch speakers that handled both full-range and subwoofer duties. Later models switched to dedicated 10 inch subwoofers with the rear door speakers handling midrange frequencies. The 8 inch setup was probably less expensive to manufacture. The 10 inch dedicated subwoofer should give you deeper bass extension - typically down to around 35-40 Hz compared to maybe 50-60 Hz with the 8 inch full-range setup.

What's the difference between coaxial and component speakers for Lexus GS300 door panels?

Component speakers separate the tweeter from the woofer. The tweeter mounts separately - usually in the door panel or A-pillar. Coaxials have the tweeter mounted directly on the woofer cone. Components typically sound better because you can position the tweeter at ear level for better imaging. The Lexus GS300 might already have tweeter locations in the doors. Coaxials are easier to install though - just drop them in the existing 6.5 inch locations. Power handling is similar... both types usually handle 50-100 watts RMS.

Do I need an amplifier when upgrading speakers in my Lexus GS300?

The factory head unit provides maybe 15-20 watts per channel. Most aftermarket speakers can handle 50-100 watts RMS. You don't need an amplifier immediately, but you're not getting full potential from your new speakers. An amplifier becomes more important if you're running component speakers - the separate crossovers need clean power to work properly. Start with speaker upgrades first, then add amplification later. The Lexus GS300 has decent wiring, so running amp power shouldn't be too difficult.