1987 Cadillac Fleetwood Speaker Sizes

The 1987 Cadillac Fleetwood factory audio system locations include front door panels that accommodate 5.25 inch speakers, and rear deck lids that support a 6x9 inch speaker size. Compatible speaker types for replacement and upgrade 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 5.25 Midbass / Full-Range
  • Standard installation
  • High replacement priority
  • Replacement difficulty: low
Rear Deck Lid 6x9 Full-Range
  • Access through trunk
  • Medium replacement priority
  • Replacement difficulty: low

1987 Cadillac Fleetwood 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

1987 Cadillac Fleetwood 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 1987 Cadillac Fleetwood contains two distinct speaker locations with different size specifications and mounting configurations.
  • Front door panel speakers utilize a 5.25-inch mounting configuration that accommodates either midbass or full-range driver types.
  • The rear deck lid positions accept 6x9-inch oval speakers designed for full-range audio reproduction.
  • Full-range speaker types can handle broader frequency ranges compared to midbass drivers, which typically focus on mid and lower frequencies.
  • The oval 6x9-inch format generally provides greater cone surface area than round 5.25-inch speakers, potentially contributing to increased low-frequency output.
  • Replacing the rear deck lid speakers might produce more noticeable bass improvements due to the larger cone surface area available in the 6x9-inch format.
  • Midbass drivers installed in the front door panels would emphasize midrange punch and vocal clarity rather than extending deep into subwoofer territory.
  • The single DIN radio opening provides standard aftermarket head unit compatibility without requiring additional mounting adapters for size conversion.
  • Upgrading to full-range speakers in the front door positions would eliminate the need for separate tweeters if high-frequency extension is desired.
  • The different speaker sizes between front and rear positions suggest a factory audio design that distributed frequency responsibilities across multiple locations.