1990 Geo Prizm Speaker Sizes
The 1990 Geo Prizm speaker size chart provides factory specifications and locations for audio system components. Information covers dashboard and rear deck lid replacement speaker specifications. Details assist with aftermarket speaker upgrade planning by documenting original equipment locations and factory specifications within the audio system.
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| 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.