These premium speaker replaces the defective speaker in your CADILLAC from model year 1957. The speaker features a dual voice coil with separate right and left channels and replaces the original mono speaker exactly in its original installation location. No vehicle modifications are required. This allows modern stereo radios or digitally converted original radios to be used without compromising the vehicle’s originality. Compared with the original full-range speaker, it also delivers significantly stronger bass and crystal-clear highs for noticeably improved sound reproduction.