1989 Pontiac Bonneville Speaker Sizes
The 1989 Pontiac Bonneville speaker size chart provides factory specifications for OEM audio system locations. Information covers dashboard and rear deck lid positions. Details support replacement or aftermarket upgrade planning by identifying where speakers are installed and their configurations within the vehicle 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 |
|
1989 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: 01989 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 1989 Pontiac Bonneville dashboard speakers present a relatively compact 4x6 inch format that may limit low-frequency response compared to larger drivers, making full-range replacements the practical configuration for this location.
- Rear deck speakers utilize a 6x9 inch format that typically provides broader frequency range capability than the dashboard units, with the larger cone area potentially offering improved bass output and overall sound staging from the rear channels.
- Both speaker locations specify full-range driver compatibility, suggesting the factory system relied on single drivers per location rather than component setups with separate tweeters and woofers.
- Dashboard speaker replacement might prove more challenging due to space constraints inherent to 4x6 inch mounting locations, while the rear deck 6x9 inch positions generally offer more flexibility for aftermarket upgrades with higher power handling.
- The single DIN radio opening follows period-standard head unit sizing, allowing straightforward replacement with modern single DIN receivers or double DIN units using appropriate dash kits.
- Full-range speakers in both locations indicate that system frequency response depends entirely on individual driver capabilities rather than crossover networks dividing frequencies between dedicated components.
- The rear deck position likely serves as the primary bass source given the larger 6x9 inch format, while dashboard speakers would handle primarily midrange and treble frequencies despite their full-range designation.