1987 Pontiac Bonneville Speaker Sizes
The 1987 Pontiac Bonneville factory audio system includes specific mounting points, where the dashboard accommodates 3.5 inch speakers, and the rear deck lid accommodates 4x10 inch units. Selecting a suitable replacement and upgrade for compatible full-range speaker types involves matching the exact mounting parameters.
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 | 4x10 | Full-Range |
|
1987 Pontiac Bonneville 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: 01987 Pontiac Bonneville 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 1987 Pontiac Bonneville features factory speaker openings in two locations, with dashboard positions accepting 3.5-inch units and rear deck lid positions accommodating 4x10-inch configurations, both designed for full-range speaker installations.
- Dashboard speakers represent the smallest factory openings at 3.5 inches, which may limit bass response capabilities compared to larger speaker formats available in other vehicle positions.
- The 4x10-inch rear deck speakers provide a larger surface area than the dashboard units, potentially offering improved mid-range frequency reproduction and higher output levels in factory configuration.
- Both factory locations specify full-range speaker compatibility, indicating the original design intended single speakers to reproduce the complete frequency spectrum without dedicated tweeters or woofers.
- Replacing dashboard speakers might present challenges due to the compact 3.5-inch format, as aftermarket options in this size category are less common than standard 3.5-inch or larger round formats.
- The 4x10-inch rear deck format follows an oval configuration that was prevalent in domestic vehicles of this era, though this size has become less standard in contemporary aftermarket speaker manufacturing.
- Sound staging could be affected by the dashboard speaker placement, as the 3.5-inch format at this location typically provides directional cues and upper frequency content in the listening environment.
- Upgrading to aftermarket full-range speakers in both locations might enhance overall audio clarity and dynamic range compared to aging factory components, particularly if original speakers have deteriorated over time.
- The single DIN radio opening allows for straightforward head unit replacement, which could complement speaker upgrades by providing improved amplification and source signal quality to the existing speaker positions.