1990 Geo Prizm Speaker Sizes
The 1990 Geo Prizm factory audio system includes specific mounting locations that accept designated components. Specifically, dashboard locations accommodate 4 inch speakers, and rear deck lid areas accept 5x7 inch units. Furthermore, compatible types for sound system replacement and upgrade operations consist of midrange and full-range configurations.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4 | Midrange |
|
| Rear Deck Lid | 5x7 | Full-Range |
|
1990 Geo Prizm 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 Geo Prizm 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 Geo Prizm featured two speaker locations: dashboard positions for 4-inch midrange drivers and rear deck lid positions for 5x7-inch full-range speakers.
- Rear deck lid speakers were likely the primary sound source in this configuration, as full-range drivers handle the complete audio spectrum while dashboard midrange units focus on vocal frequencies.
- The 4-inch dashboard midrange speakers probably handled frequencies between approximately 300Hz and 5kHz, supplementing the rear full-range output rather than providing standalone audio reproduction.
- Factory installations typically prioritized rear deck lid speaker replacement when upgrading, since these 5x7-inch units managed bass, midrange, and treble reproduction simultaneously.
- The single DIN radio opening suggests standard aftermarket head unit compatibility without requiring additional mounting adapters or modifications to the dashboard structure.
- Midrange-specific dashboard speakers indicated a multi-component approach where frequency ranges were divided between locations rather than relying solely on identical full-range drivers throughout the cabin.
- The 5x7-inch configuration provided a larger cone surface area compared to round 5.25-inch speakers, potentially offering improved bass response despite similar mounting footprints.
- Replacement options for the rear deck position could include both 5x7-inch and 6x8-inch aftermarket speakers, as these sizes often share compatible mounting patterns.