1990 GMC S15 Speaker Sizes
Speaker size chart for the 1990 GMC S15 lists factory speaker locations and specifications for replacement or upgrade purposes. Information covers speakers behind the seat and in the dashboard positions. Data includes specifications for both factory and aftermarket audio system components to assist with speaker replacement in these locations.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Behind Seat | 4x10 | Full-Range |
|
| Dashboard | 4x6 | Full-Range |
|
1990 GMC S15 Speaker Replacement Summary
2
total positions
0
easy to replace
0
high priority
0
professional only
Replacement difficulty:
Low: 0 Medium: 2 High: 0Replacement priority:
High: 0 Medium: 2 Low: 01990 GMC S15 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 GMC S15 features two distinct speaker locations with different size requirements, each supporting full-range speaker types that handle the complete audio frequency spectrum without requiring separate tweeters or woofers.
- Behind-seat speakers use a 4x10 inch mounting footprint, which represents a rectangular form factor common in truck installations where space constraints favor elongated shapes over circular designs.
- Dashboard speakers accommodate 4x6 inch units, a smaller rectangular configuration that fits within the limited mounting depth and surface area typically available in instrument panel locations.
- Replacement speakers for both locations would likely prioritize full-range designs to maintain the original single-speaker-per-location architecture, though component systems with separate tweeters could potentially be installed with custom mounting solutions.
- The behind-seat position may offer greater mounting depth and airspace compared to dashboard locations, potentially allowing for speakers with larger magnets and improved bass response when upgrading from factory units.
- Dashboard speakers might benefit more from tweeters with enhanced high-frequency dispersion characteristics, as their forward-facing position affects how sound reaches occupants in different seating positions.
- The single DIN radio opening provides standard aftermarket head unit compatibility, which could enable modern amplification and signal processing features that may improve output to the factory speaker locations.
- Sound improvement through speaker replacement would depend on factors including power handling capacity, sensitivity ratings, and cone material composition compared to the original equipment specifications.