Subwoofer Wiring Diagrams | the12volt This subwoofer wiring application includes diagrams for Single Voice Coil (SVC) and Dual Voice Coil (DVC) speakers. A SVC speaker has one voice coil and one set of terminals, one positive (+) and one negative (-). A DVC speaker has two voice coils, each with its own set of terminals. Because of thisTwo 2 Ohm DVC · Two 4 Ohm DVC · Four 4 Ohm DVC · Two 4 Ohm SVC · One 4 Ohm DVC CT Sounds Subwoofer Wiring Calculator and Sub Wire Find out the easiest way to wire you subwoofers using our subwoofer wiring diagrams for your car audio setup, available for free! Enjoy the subwoofer wiring calulator and share the knowledge for free. This Subwoofer Wiring Diagrams are presented to you by CT Sounds.