Subwoofer Wiring Diagrams for Two 4 Ohm Dual Voice Coil Diagrams and options for wiring Two 4 Ohm Dual Voice Coil (DVC) Speakers. Below are the available wiring diagrams for the speaker configuration you selected. The resulting impedance (ohm load) is considered the "Nominal Impedance" seen by the amplifier. Subwoofer Wiring Diagrams | Sonic Electronix knowledgecelectronix›ToolsSep 29, 20141) What is the difference between dual and a single voice coil? The voice coil of a car subwoofer is the coiled wire that is wrapped around the “former”, or cylinder inside the subwoofer. The two voice coil configurations allow for different wiring options. For more information on voice coils, please refer to our Knowledge Base.
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