Our 1958 Impala speakers will provide stereo sound and fit in the original dash location. We offer three different 1958 Chevy Impala dash speakers. The dual dash mountspeaker consists of two, 3.5" speakers mounted on a plate in order to give you stereo sound. This style speaker is available with either Custom Autosound or Kenwood 3.5" speakers.The other 1958 Impala speaker is a dual voice coil speakers which consists of two tweeters mounted on a single, larger speaker. One tweeter is for the left channel and the other is for the right.We recommend the dual voice coil dash speaker as it provides better mid-range response due to the fact that center area is actually mid-range cone instead of a plate.In addition, the dual voice coil speaker has a higher power rating.