The Pioneer TS-W312D4 is a 12 inch dual voice coil car subwoofer rated to 1600W peak power and configured as dual 4 ohm coils. It is engineered to reproduce low-frequency bass in automotive sound systems.

The dual 4 ohm voice coils provide multiple wiring options to match amplifier impedance and power. The driver is intended for installation in standard 12 inch sealed or ported enclosures and requires a compatible amplifier and secure mounting.