Wiring a single dual 4 ohm subwoofer to a final impedance of 2 ohms can be achieved wiring the voice coils together in parallel.
Subwoofer Wiring Steps:
1Connect both positive terminals on the subwoofer
2Connect both negative terminals on the subwoofer
3Connect a positive subwoofer terminal to the positive terminal on the box
4Connect a negative subwoofer terminal to the negative terminal on the box
At this point you should have all the postive terminals connected together and all the negative terminals wired together. This method is called ‘parallel’ wiring and enables the dual 4 ohm subwoofer to achieve a 2 ohm final impedance.
This is a very common wiring method used for most single subwoofer installations because the 2 ohm load is stable, yet offers a fair amount of power.
For more information on subwoofer wiring diagrams and other diagrams, please visit the main Subwoofer Wiring Diagrams page.