1991 Geo Metro Speaker Sizes
The 1991 Geo Metro factory audio system features specific mounting positions, where the dashboard accepts 4 inch speakers and the rear door panel supports 4x6 inch units. Midrange and full-range designs function as compatible replacement and upgrade options for the vehicle.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4 | Midrange |
|
| Rear Door Panel | 4x6 | Full-Range |
|
1991 Geo Metro 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 Geo Metro 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 Geo Metro dashboard speakers operate as midrange drivers, which suggests they may handle mid-frequency content rather than full-range audio reproduction, potentially limiting their output in both bass and treble registers without additional speaker components elsewhere in the system.
- The rear door panel locations accept 4x6 inch full-range speakers, indicating these positions likely serve as the primary source for complete frequency reproduction in vehicles lacking additional subwoofer or dedicated tweeter installations.
- Replacing the dashboard midrange speakers could improve vocal clarity and instrument definition in the mid-frequency spectrum, though owners might notice limited impact on low-end response or high-frequency extension compared to upgrading the rear full-range units.
- The 4x6 inch rear door speakers in the 1991 Geo Metro may represent the priority replacement location for those seeking overall sound quality improvement, given their full-range design covering bass, midrange, and treble frequencies within a single driver assembly.
- Aftermarket speaker selections for the dashboard location would need to accommodate the midrange-specific role, meaning full-range replacements in this position might not function optimally without crossover adjustments or system reconfiguration to account for frequency overlap with the rear speakers.
- The single DIN radio opening allows for head unit upgrades that could provide additional power output or signal processing capabilities, potentially benefiting both the dashboard midrange and rear full-range speaker performance through improved amplification or equalization features.