1991 Pontiac Bonneville Speaker Sizes
The 1991 Pontiac Bonneville speaker size chart provides factory specifications for stock audio system components. Information includes speaker locations in the dashboard and rear deck lid areas. Data covers replacement and upgrade options for aftermarket speakers, detailing specifications for each position within the factory audio system.
As an Amazon Associate, we may earn a commission from purchases made through links marked. Read more in our disclaimer.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4x6 | Full-Range |
|
| Rear Deck Lid | 6x9 | Full-Range |
|
1991 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: 01991 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 1991 Pontiac Bonneville features two distinct speaker locations with different size requirements, suggesting a prioritized approach to audio upgrades based on listening position and cabinet volume constraints.
- Dashboard speakers utilize 4x6 inch full-range drivers, a size constraint that limits cone area to approximately 15 square inches, which may affect bass response and overall acoustic output compared to larger formats.
- Rear deck lid positions accommodate 6x9 inch full-range speakers, providing roughly 42 square inches of radiating surface area, potentially allowing for greater low-frequency extension and higher sound pressure levels than the front locations.
- Full-range speaker compatibility across both locations indicates factory integration without dedicated tweeters or woofers, meaning single-driver solutions handle the entire frequency spectrum from bass through treble.
- Aftermarket speaker selection could focus on the rear deck positions first due to their larger mounting footprint, which typically translates to improved sensitivity ratings and broader frequency response capabilities.
- The standard Single DIN radio opening suggests straightforward head unit replacement options without complex dash modifications, maintaining integration with the existing speaker system during audio source upgrades.
- Coaxial speaker designs with integrated tweeters might offer improved high-frequency dispersion over factory units, particularly relevant given the full-range driver requirement in both front and rear positions.
- Power handling considerations would differ between the 4x6 and 6x9 locations, as the larger rear speakers typically accept higher wattage inputs while maintaining similar impedance ratings, usually 4 ohms.