1981 Ford F-350 Speaker Sizes

The 1981 Ford F-350 factory audio system features specific location configurations, such that the front door panel accepts a 6.5 inch speaker size while the rear door panel accommodates 6x9 inch speakers. Available replacement and upgrade options include midbass and full-range units.

Specific details regarding locations, speaker sizes, and types are outlined in the compatibility chart.

Speaker Details by Location
Location Size Type Notes
Front Door Panel 6.5 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Rear Door Panel 6x9 Full-Range
  • Standard installation
  • Medium replacement priority
  • Replacement difficulty: low

1981 Ford F-350 Speaker Replacement Summary

2 total positions
2 easy to replace
1 high priority
0 professional only

Replacement difficulty:

Low: 2 Medium: 0 High: 0

Replacement priority:

High: 1 Medium: 1 Low: 0

1981 Ford F-350 Radio Slot Size (DIN)

DIN Type Size (inch) Size (mm) Notes
Single DIN or Double DIN 7"×2" or 7"×4" 180×50 or 180×100 Vehicle supports both radio sizes
  • Always measure the slot before purchasing a new radio
  • Check slot depth - it may vary

Additional Notes

  • The 1981 Ford F-350 utilizes round 6.5-inch openings in the front door panels, which accommodate either midbass drivers in component setups or full-range coaxial speakers for simplified installations.
  • Rear door panels accept 6x9-inch oval speakers configured for full-range operation, providing a distinct size from the front locations and potentially broader frequency response characteristics.
  • Component speaker systems could leverage the front locations for dedicated midbass reproduction while incorporating separate tweeters mounted elsewhere in the cabin.
  • The 6x9-inch format in rear positions typically offers increased cone area compared to round 6.5-inch drivers, which may contribute to enhanced low-frequency output.
  • Full-range coaxial speakers in both front and rear locations would provide integrated tweeter elements within single assemblies, simplifying the upgrade process.
  • Aftermarket head units fitting either single DIN or double DIN specifications could replace the factory radio in the 1981 Ford F-350, with double DIN units offering larger display interfaces and additional control options.
  • Replacement speakers maintaining factory size specifications would likely install without modifications to door panel openings or mounting brackets.
  • Power handling capabilities and sensitivity ratings of aftermarket speakers would influence overall sound pressure levels achievable within the cabin environment.