Wiring a dual voice coil subwoofer correctly is the foundational step to unlocking its potential in any audio system. While the task might seem intimidating at first, it becomes straightforward once you understand the basic principles of electrical resistance and speaker configuration. This guide walks you through the process, ensuring you achieve the correct impedance for your amplifier, whether you are installing a single sub or building a multi-sub setup.
Understanding Dual Voice Coil (DVC) Technology
A dual voice coil subwoofer features two separate voice coils mounted on a single cone assembly, which is bonded to a shared suspension system. Each coil operates independently, allowing you to treat the sub as two distinct speakers electrically. The primary benefit of this design is flexibility; you can wire the coils in series or parallel to match the ohm load requirements of your amplifier, ensuring optimal power delivery and thermal management.
Determining Your Target Impedance
Before touching a wire, you must determine the ideal impedance for your amplifier. Most car audio amplifiers perform best at 2 or 4 ohms, and a DVC sub provides the necessary flexibility to hit these targets. Check your amplifier’s specifications to see if it prefers a lower ohm load to operate at its maximum power rating safely. If your amp is stable at 2 ohms, you will likely wire the coils differently than if it is stable at 4 ohms.
Wiring for Series Configuration
Series wiring increases the total impedance of the subwoofer assembly. In this configuration, you connect the positive terminal of your amplifier to the positive terminal of the first coil, then connect the negative of that coil to the positive of the second coil, finally connecting the negative of the second coil to the amplifier’s negative terminal. This effectively doubles the resistance; for example, two 4-ohm coils wired in series result in an 8-ohm load.
Series Wiring Diagram
Wiring for Parallel Configuration
Parallel wiring decreases the total impedance, which is ideal for forcing an amplifier to deliver more current. To wire in parallel, you connect both positive terminals of the subwoofer’s voice coils to the amplifier’s positive terminal, and both negative terminals to the amplifier’s negative terminal. This halves the resistance; for example, two 4-ohm coils wired in parallel result in a 2-ohm load.
