Plymouth Reliant Speaker Size

Speaker size, type, and location chart for Plymouth Reliant models from 1981 to 1989 production years.

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Dashboard Speaker

YearsTypeSize (inch)
1981 - 1989Full-Range3.5

Rear Deck Lid Speaker

YearsTypeSize (inch)
1981 - 1989Full-Range5x7

Plymouth Reliant Speaker FAQ

What speakers should I replace first in my Plymouth Reliant for better sound quality?

Replace the 5x7 rear deck speakers first. They handle most of your music's frequency range and probably need it more than the 3.5-inch dashboard units. The rear deck location gives you around 15-25 watts RMS handling typically, while those tiny dash speakers might only push 8-12 watts. Your Plymouth Reliant's rear deck has more mounting space too. Makes the installation cleaner.

Can I install component speakers in the Plymouth Reliant's rear deck location?

Yes, but you'll need to mount the tweeter separately since the 5x7 opening won't accommodate both drivers. Component systems typically offer better imaging around 2kHz-20kHz compared to coaxials. You might mount the tweeter in the rear window area or C-pillar, though some people just run the woofer alone. The Plymouth Reliant's rear deck can handle most component woofers rated up to 30-40 watts RMS at 4 ohms.

Why are my Plymouth Reliant dashboard speakers so quiet compared to aftermarket options?

The 3.5-inch size limits low-frequency response to maybe 150Hz and up. Factory speakers in that location probably run 2-3 watts RMS, while aftermarket 3.5s can handle 15-20 watts with better sensitivity ratings. Your Plymouth Reliant's dashboard placement isn't ideal for bass anyway. Those speakers work better for vocals and mid-range clarity around 500Hz-5kHz rather than trying to reproduce everything.

What's the difference between coaxial and full-range speakers for my Plymouth Reliant?

Coaxial speakers have a separate tweeter mounted on the woofer cone, usually crossing over around 3-4kHz. Full-range speakers use one cone to reproduce all frequencies, which can sound more integrated but might lack crisp highs above 8kHz. In your Plymouth Reliant's 5x7 rear location, coaxials often provide better stereo separation. The 3.5-inch dash speakers work fine as full-range since they can't reproduce bass effectively anyway.

How do I verify the correct speaker size for my Plymouth Reliant before buying replacements?

Measure the actual mounting holes, not the speaker frame. The 5x7 rear deck should measure approximately 5 inches by 7 inches between mounting screws, while dashboard openings should be around 3.5 inches diameter. Your Plymouth Reliant might have slight variations depending on trim level. Check the depth too - you'll need at least 2-3 inches clearance behind the rear deck and maybe 1.5 inches for the dash speakers. Some aftermarket speakers run deeper than factory units.