[Shop-talk] Car audio

[Bob Nogueira]

Several years ago I spent time and effort to get audio in my LBC  that was
listenable with the top down. Recently I realized that the sound quality had
deteriorated at the upper volume levels needed for top down listening.
I figured I had blown out the speakers so replaced two of the four and found
no difference.
Can modern car radios go bad in a manner that the quality of the sound
deteriorates at high volume as a bad speaker or did I just buy some bad
speakers?
Any way to check the radio?

Bob