1985 Porsche 911 Speaker Sizes
The 1985 Porsche 911 speaker size chart provides factory specifications for audio system components in designated locations. Information covers replacement and upgrade options for speakers in front door panel and rear door panel positions. Aftermarket audio system specifications are available for factory speaker locations throughout the vehicle.
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| Location | Size | Type | Notes |
|---|---|---|---|
| Front Door Panel | 5.25 | Midbass / Full-Range |
|
| Rear Door Panel | 4x6 | Full-Range |
|
1985 Porsche 911 Speaker Replacement Summary
2
total positions
2
easy to replace
1
high priority
0
professional only
Replacement difficulty:
Low: 2 Medium: 0 High: 0Replacement priority:
High: 1 Medium: 1 Low: 01985 Porsche 911 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 1985 Porsche 911 features front door panels that accommodate 5.25 inch speakers, which can be replaced with either midbass drivers or full-range units depending on the audio configuration goals. This flexibility in speaker type selection allows for different approaches to sound reproduction in the front stage.
- Rear door panels in this model accept 4x6 inch speakers, which are limited to full-range type replacements. The oval format of these rear speakers represents a different mounting requirement compared to the round front speakers, and the full-range designation suggests these positions handle a broader frequency spectrum without separate tweeters.
- The single DIN radio specification indicates a standard head unit size, which was common during this era and provides straightforward aftermarket receiver compatibility. This radio format typically measures 2 inches in height and maintains consistent width standards across automotive audio applications.
- Front speaker positions in the 1985 Porsche 911 may benefit from priority attention during upgrades, as the 5.25 inch size and midbass capability option could provide more substantial sonic improvements compared to the smaller rear locations. The ability to install dedicated midbass drivers in the front suggests potential for enhanced lower-frequency response in the primary listening area.
- The distinction between midbass and full-range options for the front speakers reflects different performance characteristics, where midbass units would typically handle frequencies from the upper bass through lower midrange when paired with separate tweeters, while full-range speakers attempt to reproduce the entire audible spectrum through a single driver.