Oldsmobile 88 Speaker Size
Speaker size, type, and location chart for Oldsmobile 88 models from 1992 to 1999 production years.
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Dashboard Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 1992 - 1999 | Full-Range | 5.25 |
Rear Deck Lid Speaker
| Years | Type | Size (inch) |
|---|---|---|
| 1992 - 1999 | Full-Range | 6x9 |
Oldsmobile 88 Speaker FAQ
What speakers should I replace first in my Oldsmobile 88?
Replace the 6 x 9 inch rear deck speakers first. These handle most of your bass output and tend to blow out sooner than dashboard units. The rear deck location gets more power - typically around 50-75 watts RMS. Dashboard speakers might only see 25-40 watts. Start with coaxial 6 x 9s rated for at least 60 watts RMS and 4-ohm impedance. You'll notice the biggest improvement right away since these speakers carry the low-frequency load from 40Hz to 200Hz.
Can I install component speakers in the Oldsmobile 88 dashboard location?
Yes, but coaxials might work better for most people. The dashboard space accommodates both 5.25 inch coaxial and component systems. Components give you better imaging - the tweeters separate from woofers. But you need mounting space for crossovers, usually under the dash. Coaxials are simpler. One speaker handles everything from 80Hz to 20kHz. For the Oldsmobile 88, coaxials rated around 35-50 watts RMS should match your factory amplifier output without distortion.
What's the difference between coaxial and triaxial speakers for the rear deck?
Triaxial adds a mid-range driver to the coaxial design. Standard coaxials have a woofer and tweeter. Triaxials include a small cone for midrange frequencies around 500Hz to 3kHz. This can improve vocal clarity in your Oldsmobile 88. But triaxials sometimes sound muddy because three drivers share the same space. Quality coaxials often perform better than cheap triaxials. Look for frequency response specs - good coaxials should handle 45Hz to 18kHz smoothly. The rear deck mounting depth allows most 6 x 9 speakers, so you have options.
Why does my Oldsmobile 88 have full-range speakers listed for the rear?
Full-range means the speakers reproduce the complete audio spectrum without a subwoofer. Your 6 x 9 rear speakers handle bass, midrange, and treble - roughly 40Hz to 15kHz. This works because 6 x 9 speakers have enough cone area for decent bass response. The oval shape gives you more surface area than round speakers. About 15% more cone area than a 6.5 inch round speaker. So your Oldsmobile 88 relies on these rear speakers for low-end punch. That's why they're more important to upgrade first.