However, common sizes found in 1989 Mustangs include:
* Doors: Typically 6x9 inches in the doors. Some might have 6.5-inch speakers instead, depending on the trim level and options.
* Dash (or rear deck depending on the model): Usually 4x6 inches, though some might have smaller speakers.
To know for sure, you should:
* Check the existing speakers: The easiest way is to remove a speaker and check the size printed on the back.
* Consult a parts catalog: Use the VIN number of your Mustang with online parts catalogs or search for parts specifically for a 1989 Mustang convertible to find the factory speaker specifications.
* Look at online forums: Mustang enthusiast forums often have detailed discussions about audio upgrades, and someone might have documented their car's speaker sizes.
It's important to note that many owners upgrade their speaker systems. So what you find might not be original equipment.
