Operation CHARM: Car repair manuals for everyone.

Preliminary Information

The sound quality of all systems relies on the speakers. An otherwise excellent sound system can sound very poor if the speakers are sub-standard.

This also applies to the installation of the speakers. If the installation is poor the sound quality will be poor. Be very careful when installing speakers.


Caution: Never install used speakers in a new car or with a new stereo system. Speakers deteriorate with time.