Oldsmobile Achieva Speaker Size

Front Door Panel Speaker

Dashboard Speaker

Rear Door Panel Speaker

Rear Deck Lid Speaker

Oldsmobile Achieva Speaker FAQ

What speakers should I replace first in my Oldsmobile Achieva for the biggest sound improvement?

Replace the front door speakers first - they handle most vocals and midrange frequencies. The 6.5 inch front doors in later Achieva models will give you more bass response than the 4 x 6 inch speakers in earlier versions. These front speakers typically handle 20-50 watts RMS and operate around 4 ohms. The dashboard speakers are secondary since they mainly fill in high frequencies above 3kHz.

Can I install component speakers in my Oldsmobile Achieva front doors?

Yes, both the 6.5 inch and 4 x 6 inch front door locations support component systems. You'll need to mount tweeters separately - the dash location might work for tweeters if you're upgrading the 4 x 6 setup. Component speakers typically separate frequencies around 3-4kHz, sending highs to tweeters and mids/bass to woofers. This improves imaging compared to coaxial designs where all drivers are stacked.

Why does my Oldsmobile Achieva have different speaker sizes between model years?

The speaker configuration changed significantly between generations. Earlier models used 4 x 6 inch front speakers with 6 x 9 inch rear deck speakers. Later versions standardized on 6.5 inch rounds front and rear, plus added 3.5 inch dash speakers. The 6.5 inch speakers generally provide better bass extension down to around 60-80Hz compared to the 4 x 6 format which might roll off around 100Hz.

What's the difference between coaxial and triaxial speakers for my Oldsmobile Achieva rear deck?

Triaxial speakers add a super tweeter for frequencies above 10kHz, extending the high-end response. The rear 6 x 9 location in your Achieva can accommodate either type. Coaxial designs typically use a tweeter and woofer, while triaxial adds that third driver. The extra driver might help with rear-seat passenger experience, but... the benefit depends on your listening position and music preferences.

Do I need to upgrade the dashboard speakers in my Oldsmobile Achieva?

The 3.5 inch dash speakers mainly handle upper midrange and treble above 2kHz. They're less critical than door speakers for overall sound quality. If your front door speakers are decent, the dash speakers just fill in some detail. However, if you're keeping weak factory door speakers, upgrading the dash units to something handling 15-25 watts might help balance the sound. The small size limits bass output anyway.