A word about classic car audio...
 
These systems are a compromise. The purpose of these systems is to give you some of the features and convenience of modern car audio without altering your classic car.  There are no major audio companies currently producing "2 shaft" radios.  Most modern car audio is a "din" or "double din" mount.  In order to fit these to your classic car, you'll have to cut a gaping hole in it.  No one wants to do that to a classic car.  Speaker systems are designed to acoustically complement the particular characteristics of the car for which it is designed.  Amplifiers are used to augment the sound so that the speakers are driven at there peak efficiency.  It is simply impossible to accomplish this level of sound quality for your valuable collector car.   
 
The radios shown here are made in a basic chassis that is altered to fit your car.  No modifications are needed to your classic vehicle.  Speaker systems are designed to fit many different locations and situations, again without altering your car.  These are a nice compromise, but are by no means "audiophile" quality systems.  They will not sound as clear as the stereo in your new car, or shake the car on either side of you at the next stoplight.  An in dash radio and a small dash speaker cannot product this kind of sound.  They do provide a reasonable level of sound quality that is acceptable to most classic car collectors. 
 
Additional amplification and better quality speakers, as well as a CD changer, iPod, or a MP3 source will greatly improve the sound quality of these systems.  The better the source of your music, the better it will sound.  If your car has provisions for a standard size speaker (for example a 6x9 in the rear deck), your sound quality will be much improved by purchasing brand name speakers and an amplifier that suits your particular listening requirements, while still maintaining the integrity of your vehicle. These speakers and amplifiers should be purchased from your local car audio dealer.