1989 Mitsubishi Sigma Speaker Sizes
The 1989 Mitsubishi Sigma factory audio system includes a dashboard that accommodates 3.5 inch speakers, and a rear deck lid that accepts a 6.5 inch speaker size. Midbass and full-range units serve as a replacement and upgrade for the vehicle. Coaxial and component models function adequately within the enclosures.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Dashboard | 3.5 | Full-Range |
|
| Rear Deck Lid | 6.5 | Midbass / Full-Range |
|
1989 Mitsubishi Sigma 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: 01989 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 1989 Mitsubishi Sigma features two distinct speaker locations with different size requirements, suggesting a basic front and rear audio configuration that may benefit from prioritizing the larger rear deck speakers when planning replacements.
- Dashboard speakers at 3.5 inches are limited to full-range drivers, which typically handle a broad frequency spectrum from a single cone assembly rather than separating frequencies across multiple driver types.
- Rear deck lid speakers accommodate 6.5 inch drivers with options for either midbass or full-range types, providing flexibility depending on whether the owner wants dedicated low-frequency reproduction or another set of multi-frequency drivers.
- The size difference between dashboard and rear locations suggests the rear deck speakers likely contribute more low-frequency output to the cabin, making them potentially more impactful for overall sound quality improvements.
- Full-range compatibility across both locations indicates the factory system probably used passive speaker configurations without external crossovers, simplifying aftermarket speaker installation.
- Choosing midbass drivers for the rear deck position would require additional tweeters or reliance on the dashboard speakers for high-frequency content, while full-range drivers maintain a self-contained frequency response.
- The single DIN radio slot offers standard aftermarket head unit compatibility, potentially allowing power and signal improvements that would work effectively with upgraded speakers at either location.
- Upgrading the 6.5 inch rear speakers first might provide more noticeable bass response and overall volume compared to replacing the smaller dashboard units due to the larger cone area and excursion potential.