1989 Buick Regal Speaker Sizes
The 1989 Buick Regal speaker size chart provides specifications for factory and aftermarket audio system components. Information covers speaker locations throughout the vehicle, including dashboard, front door panel, and rear deck lid positions. Reference data includes replacement and upgrade options for stock audio configurations.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4 | Midrange |
|
| Front Door Panel | 4x6 | Full-Range |
|
| Rear Deck Lid | 6x9 | Full-Range |
|
1989 Buick Regal Speaker Replacement Summary
3
total positions
2
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 2 Medium: 1 High: 0Replacement priority:
High: 1 Medium: 2 Low: 01989 Buick Regal 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 Buick Regal contains three distinct speaker locations with different size requirements and functional roles in the audio system.
- Dashboard speakers at 4 inches are designated for midrange frequencies, suggesting they handle vocal and instrumental content in the middle frequency spectrum rather than the full audio range.
- Front door panel speakers at 4x6 inches utilize an oval form factor and function as full-range units, indicating they reproduce both low and high frequencies from a single driver assembly.
- Rear deck lid speakers at 6x9 inches represent the largest factory openings and operate as full-range units, potentially providing enhanced bass response compared to the smaller front door speakers.
- The single DIN radio specification indicates a standard aftermarket head unit could be installed without requiring dashboard modifications or additional mounting adapters.
- Upgrading the rear deck speakers may yield noticeable improvements in overall system output given their larger surface area for moving air compared to the dashboard and door locations.
- The combination of dedicated midrange dashboard speakers with full-range door and deck speakers suggests a factory attempt at frequency distribution across the cabin space.
- Aftermarket speaker selection would need to account for the oval 4x6 configuration in the doors, which limits options compared to round speaker formats.