1988 Plymouth Horizon Speaker Sizes
The 1988 Plymouth Horizon factory audio system features specific mounting locations for audio transducers. Front door panels accommodate 5.25 inch speakers, and rear door panels accept 6x9 inch units. For a successful replacement and upgrade, compatible speaker types include midbass and full-range.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 5.25 | Midbass / Full-Range |
|
| Rear Door Panel | 6x9 | Full-Range |
|
1988 Plymouth Horizon Speaker Replacement Summary
2
total positions
2
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 2 Medium: 0 High: 0Replacement priority:
High: 1 Medium: 1 Low: 01988 Plymouth Horizon 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 front door panels in the 1988 Plymouth Horizon accommodate 5.25-inch speakers, which can be replaced with either midbass drivers or full-range units depending on the audio configuration goals. Midbass speakers typically handle mid-to-low frequencies and would require a separate tweeter for high-frequency reproduction, while full-range speakers attempt to cover the entire frequency spectrum in a single driver.
- Rear door panel positions accept 6x9-inch speakers designated for full-range operation. This oval speaker format generally provides greater cone surface area compared to round speakers of similar mounting footprint, potentially offering improved bass response and overall output in the rear soundstage.
- The front location priority might favor full-range speakers for simpler installations, though dedicated midbass units paired with separate tweeters could provide better frequency separation and staging characteristics. The rear 6x9-inch positions would typically serve as secondary fill speakers or could handle bass frequencies if the front speakers are configured as midbass-only.
- The single DIN radio opening suggests limited dashboard space, which may influence amplifier placement options if upgraded speakers with higher power handling are installed. Aftermarket head units in this form factor can provide improved signal processing compared to factory equipment from this era.
- Sound quality improvements would likely come from replacing aged factory speakers, as foam surrounds and paper cones deteriorate over decades of use. Modern replacement speakers in these stock sizes often feature more durable materials like rubber or treated cloth surrounds and polypropylene cones that maintain performance characteristics longer.