1989 Pontiac Grand Prix Speaker Sizes
The 1989 Pontiac Grand Prix speaker size chart provides factory speaker specifications and locations for audio system replacement or upgrade. Information includes speaker positions in the dashboard and rear deck lid. Data covers both factory and aftermarket speaker options to assist with audio system modifications.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4x6 | Full-Range |
|
| Rear Deck Lid | 6x9 | Full-Range |
|
1989 Pontiac Grand Prix 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: 01989 Pontiac Grand Prix 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 1989 Pontiac Grand Prix features two distinct speaker locations with different size requirements, suggesting that dashboard speakers may benefit from replacement before rear deck speakers due to their proximity to occupants and typically higher exposure to environmental factors.
- Dashboard positions accommodate 4x6 inch full-range speakers, a rectangular format that tends to offer better midrange response than circular equivalents while fitting into the limited depth constraints typically found in instrument panel installations.
- Rear deck lid positions accept 6x9 inch full-range speakers, a larger oval configuration that generally provides enhanced bass output and higher sensitivity ratings compared to smaller formats, potentially contributing to improved low-frequency performance in the cabin.
- Both locations specify full-range speaker types, indicating that the factory audio system likely relies on single-driver solutions rather than component setups, which could limit high-frequency extension compared to systems utilizing separate tweeters.
- The single DIN radio specification suggests that head unit replacement options remain widely available, as this standardized format continues to be supported by aftermarket manufacturers offering features like improved amplification and equalization controls.
- Upgrading the rear deck speakers first might produce more noticeable sound quality improvements due to their larger radiating area and potential for greater volume displacement, though this depends on listening preferences and the condition of existing components.
- The rectangular and oval speaker shapes indicate that direct replacement requires matching these specific footprints, as circular alternatives would necessitate adapter brackets or mounting modifications to secure properly within the factory openings.