1981 Plymouth Reliant Speaker Sizes
The 1981 Plymouth Reliant factory audio system locations feature the dashboard which accommodates 3.5 inch speakers, and the rear deck lid which accepts 5x7 inch units. Compatible speaker types for a replacement upgrade include full-range audio components. Each installed 3.5 inch speaker size delivers standard acoustic performance.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 3.5 | Full-Range |
|
| Rear Deck Lid | 5x7 | Full-Range |
|
1981 Plymouth Reliant Speaker Replacement Summary
2
total positions
1
easy to replace
0
high priority
0
professional only
Replacement difficulty:
Low: 1 Medium: 1 High: 0Replacement priority:
High: 0 Medium: 2 Low: 01981 Plymouth Reliant Radio Slot Size (DIN)
| DIN Type | Size (inch) | Size (mm) | Notes |
|---|---|---|---|
| Single DIN | 7"×2" | 180×50 | Standard size for basic car radios with small display or no display |
- Always measure the slot before purchasing a new radio
- Check slot depth - it may vary
Additional Notes
- The dashboard location in the 1981 Plymouth Reliant accepts 3.5 inch full-range speakers, which represents a relatively small mounting area that may limit low-frequency output capabilities compared to larger speaker positions.
- Full-range speakers serve as single-driver solutions that handle the entire frequency spectrum without requiring separate tweeters or woofers, though this design approach typically involves compromises in both high and low frequency extension.
- The rear deck lid position accommodates 5x7 inch speakers, offering approximately 35 square inches of cone area compared to roughly 9.6 square inches in the dashboard location, which could translate to notably different bass response characteristics between front and rear positions.
- Replacing factory speakers with aftermarket units of matching dimensions might provide improvements in sensitivity ratings, power handling, and frequency response curves, though actual sonic benefits would depend on amplification quality and speaker construction materials.
- The single DIN radio specification indicates a standard 2 inch tall head unit opening, which influences available power output to drive replacement speakers and determines compatibility with modern audio source options.
- Sound staging in this configuration places smaller drivers near ear level while larger oval speakers fire upward from behind the seating position, creating a soundfield that differs from modern component speaker arrangements with separate midrange and tweeter positioning.