Designed and tooled from the ground up, the Retrosound RetroMod series of speakers meet the demand of today's high performance amplifiers while maintaining factory dimensions for original location mounting and are compatible with all digital music sources. The "N" Series features ultra thin 1.77" mounting profiles to fit in virtually any installation application. This speaker features neodymium magnet structures which are 5 times more powerful than standard speaker magnets, allowing for a substantial reduction in mounting depth and feature enhanced power handling and heat dissipation characteristics. The Dual Voice Coil design allows you to connect 2 stereo channels from your radio to one speaker, providing you with maximum sound for a single speaker application! These types of speakers are generally used in "Classic" cars that only have one speaker location in the dash or the rear deck area, being able to connect 2 stereo channels to one speaker provides for a fuller, richer sound that a mono or single voice coil speaker cannot provide.