1990 Mitsubishi Sigma Speaker Sizes
The 1990 Mitsubishi Sigma speaker size chart provides factory speaker specifications and locations for replacement or aftermarket upgrade purposes. Information includes speaker positions in the dashboard, front door panel, and rear deck lid. Data covers factory audio system configurations to assist with identifying compatible aftermarket speakers for installation in original locations.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 4 | Midrange |
|
| Dashboard | 3.5 | Full-Range |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
| Rear Deck Lid | 6x9 | Full-Range |
|
1990 Mitsubishi Sigma Speaker Replacement Summary
4
total positions
2
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 2 Medium: 2 High: 0Replacement priority:
High: 1 Medium: 3 Low: 01990 Mitsubishi Sigma 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 Mitsubishi Sigma contains multiple speaker locations with varying sizes, suggesting a factory audio system designed to distribute sound across different frequency ranges throughout the cabin.
- Dashboard positions accommodate both 3.5-inch full-range speakers and 4-inch midrange drivers, indicating the factory configuration may have separated mid-frequency reproduction from broader spectrum output in the front soundstage.
- Front door panels house 6.5-inch locations compatible with either midbass or full-range speakers, providing options for those prioritizing low-frequency extension versus balanced output from a single driver type.
- The rear deck lid features 6x9-inch openings designated for full-range speakers, a size commonly associated with enhanced bass response compared to smaller round speakers due to increased cone surface area.
- Replacing the dashboard speakers might yield noticeable improvements in vocal clarity and instrument detail, as these positions typically direct sound toward listeners with minimal obstruction.
- The door panel locations often represent a priority upgrade point since larger speakers in this position can contribute substantial low-frequency output and overall volume capability.
- Aftermarket full-range speakers in the 6x9-inch rear position could enhance rear fill and provide bass reinforcement without requiring separate subwoofer installation, though dedicated component systems might offer superior tonal accuracy.
- The single DIN radio opening allows for straightforward head unit replacement without dashboard modification, potentially enabling integration of amplifiers or processors to drive upgraded speakers more effectively.
- Speaker replacement considerations might include sensitivity ratings, as higher-efficiency models can produce greater output from factory or modest aftermarket amplification.
- The variety of speaker types and sizes throughout the cabin suggests that a staged upgrade approach could be practical, addressing the most audibly deficient locations first rather than replacing all positions simultaneously.