1990 Pontiac Grand Prix Speaker Sizes
The 1990 Pontiac Grand Prix speaker size chart lists factory speaker locations and specifications for replacement or aftermarket audio system upgrades. Information includes dashboard and rear deck lid positions. Data covers speaker specifications to assist with selecting compatible aftermarket audio components that fit factory mounting locations in the vehicle.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4x6 | Full-Range |
|
| Rear Deck Lid | 6x9 | Full-Range |
|
1990 Pontiac Grand Prix 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: 01990 Pontiac Grand Prix 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 1990 Pontiac Grand Prix features two distinct speaker locations with different size configurations that may influence replacement decisions based on listening position and acoustic priorities.
- Dashboard speakers utilize 4x6 inch full-range drivers positioned closer to front seat occupants, potentially making them candidates for initial upgrade consideration when improving overall sound quality.
- Rear deck lid speakers accommodate larger 6x9 inch full-range drivers that typically offer enhanced bass response compared to smaller dashboard units due to increased cone area and excursion capability.
- Both locations specify full-range speaker types, suggesting the factory audio system relies on single speakers per location rather than component configurations with separated tweeters and woofers.
- The size differential between front and rear speakers creates a natural staging arrangement where smaller dashboard units handle midrange frequencies while larger rear speakers contribute additional low-frequency extension.
- Replacement speakers maintaining full-range design would preserve the factory integration approach, though component speakers could be adapted to dashboard locations if sufficient depth and tweeter mounting options exist.
- The single DIN radio opening indicates standard head unit dimensions that simplify aftermarket receiver installation without requiring dash modifications or adapter kits for double DIN units.
- Upgrading rear deck speakers first might produce noticeable bass improvement for rear passengers, while dashboard speaker replacement could enhance vocal clarity and detail for front occupants.