1990 Nissan D21 Speaker Sizes
The 1990 Nissan D21 factory audio system contains specific locations designed for various audio components. Front door panels and behind seat locations accommodate 6.5 inch speakers. Compatible speaker types for a sound system replacement and audio upgrade include midbass and full-range.
Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.
| Location | Size | Type | Notes |
|---|---|---|---|
| Behind Seat | 6.5 | Midbass / Full-Range |
|
| Front Door Panel | 6.5 | Midbass / Full-Range |
|
1990 Nissan D21 Speaker Replacement Summary
2
total positions
1
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 1 Medium: 1 High: 0Replacement priority:
High: 1 Medium: 1 Low: 01990 Nissan D21 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 Nissan D21 features two distinct speaker locations that both accommodate 6.5 inch drivers, suggesting a uniform replacement strategy across the cabin audio system.
- Both the front door panel and behind seat positions support either midbass or full-range speaker configurations, providing flexibility in component selection based on whether the installation will include separate tweeters or rely on coaxial designs.
- Full-range speakers in these locations would handle the entire frequency spectrum from a single driver, while midbass options would focus on mid and lower frequencies, potentially requiring additional high-frequency drivers for complete coverage.
- The single DIN radio specification indicates a standard aftermarket head unit opening, which may influence the total power delivery available to drive replacement speakers in the 1990 Nissan D21.
- Door panel speakers often receive priority in replacement scenarios, as they typically provide more direct sound projection toward occupants compared to rear-positioned drivers.
- The behind seat location might present mounting depth considerations that differ from door installations, particularly regarding clearance behind the driver and passenger seating areas.
- Coaxial full-range speakers would consolidate tweeter and woofer elements into the 6.5 inch footprint, simplifying installation while component midbass speakers would require separate high-frequency driver placement.
- Sensitivity ratings become relevant with the factory power output limitations, as higher efficiency speakers would produce greater sound levels from the available amplification.