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How to Wire a Subwoofer in Parallel (From 4 ohm to 2 ohm load)

Wire in Parallel

Required Tools:

  • 12 Gauge Speaker Wire
  • Wire Stripper/Crimper
  • Screws
  • Power Drill
  • Solder Gun

In this article we will provide a step by step guide for wiring a dual 4 ohm subwoofer in parallel for a 2 ohm load. This technique is really quite simple but will make a big difference in terms of the power that your car subwoofer receives. For subwoofers that are 2-ohm steady, using this wiring technique will maximize the amount of power that your sub receives from your amplifier.

Step 1

Use a solder gun to attach 2 feet of 12 gauge speaker wire to the box terminals, which are located at back of the subwoofer enclosure. Using a solder gun will create a secure connection.

Step 2

Cut two strands negative (black) wiring and two strands of positive wiring; one 1’ strand and one 2’ strand. We will use the 2′ strand to connect the subwoofer to the box terminal, and the 1′ strand to connect the subwoofer’s voice coil terminals together.

Step 3

Use the wire stripper tool to strip off 1/8” to 1/4” of the wire insulation in order to expose the internal wire.

Step 4

Open the first negative terminal by pressing the top of it. Now run the stripped end of the negative wire strand through the opening. Then repeat this step with the first positive terminal and the first strand of positive wire.

Step 5

Now go back to the first negative terminal and press on the top to open it. Run one of the stripped ends of the second negative wire through the opening, then take the opposing end and run it through the second negative terminal.

Step 6

Next press on the first positive terminal and run one of the stripped ends of the second piece of positive wire through the opening. Then take the opposite end and run it through the second positive terminal.

Step 7

Verify that all of your wiring is securely connected.

After the loaded subwoofer enclosure is securely mounted and connected to an amplifier, you are ready to rock. The parallel wiring configuration will give your subwoofer more RMS wattage from the amp.

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Staff writers at Sonic Electronix are experts in their field. In addition to a complete in-house training program, these experts typically have many years of hands-on experience in their specialty. Some come from car audio installer backgrounds, while others come with extensive retail experience.
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