1989 Buick Riviera Speaker Sizes
The 1989 Buick Riviera factory audio system locations feature specific mounting areas, where the front door panel accepts a 4x6 inch speaker size and the rear deck lid accommodates 6x9 inch units. Full-range drivers serve as the compatible speaker types for an audio replacement and upgrade.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 4x6 | Full-Range |
|
| Rear Deck Lid | 6x9 | Full-Range |
|
1989 Buick Riviera 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: 01989 Buick Riviera 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 Riviera uses two different speaker formats, with 4x6 inch speakers in the front door panels and larger 6x9 inch speakers in the rear deck lid location.
- Both speaker locations accommodate full-range speaker types rather than separate component systems, suggesting the factory configuration prioritized simplicity in the audio setup.
- The front door panel speakers may be the first candidates for replacement since door-mounted speakers often handle vocal frequencies and midrange content that directly affects perceived sound quality during normal listening.
- The oval 4x6 inch form factor in the front provides a smaller radiating surface area compared to the rear speakers, which could limit low-frequency output from the front stage.
- Rear deck speakers at 6x9 inches offer a larger cone area that typically produces fuller bass response and higher output levels, potentially serving as the primary source of low-frequency content in the factory system.
- Full-range speaker compatibility in both locations means aftermarket replacements would need to reproduce the entire frequency spectrum through a single cone rather than dividing duties between tweeters and woofers.
- The single DIN radio opening provides a standard mounting depth and width, allowing for straightforward head unit upgrades without dashboard modifications.
- Replacing the rear deck speakers might deliver the most noticeable improvement in overall volume and bass presence due to their larger size and greater power handling capacity.