The 4005A dual voice coil speaker is a bracketed 5"x7" speaker that has two tweeters on it for 1967-1972 GM trucks with air conditioning. One tweeter will handle the left channel while the other will handle the right channel in order to provide you with stereo sound from a single, mono location. The 4005A, bracketed dual voice coil dash speaker is the one we recommend for 1967-1972 Chevy and GMC pickups . The dual voice coil speaker has more cone, surface area to provide better mid-range response. On the dual dash mount speakers, including the Kenwood, the center of plate is not creating any midrange sound whereas on the dual voice coil speaker it is. This DVC 4005A dual voice coil speaker has 4 wire connections on the back, (+) & (-) for the left channel, and (+) & (-) for the right channel.