How to Wire a 4 Ohm Amp to a 2 Ohm Speaker


Wiring a 4 ohm amp to a 2 ohm speaker is done often by car stereo enthusiasts. The amplifier can only operate correctly if the amp is wired to the speaker the right way. Improper wiring can cause malfunction of the amp and speaker. To get the best sound quality out of your car stereo it is imperative that you wire the cars audio system correctly.

Things You'll Need

  • Speaker wire
  • Wire strippers
  • Philips head screw driver
  • Disconnect the battery. No power should be going to the amp or the speakers.

  • Cut the length of speaker wire that you will need to go from the amp input to the speaker input. Take into account the path that you will use to run the wire to and from the amp and the speaker.

  • Strip the wire 1/4 of an inch on each end. You will insert the ends of the wire into the amp and the speaker wire terminals.

  • Connect the positive wire (this should be a wire marked with red) into the positive input of the amp and the speaker (the positive inputs should also be marked red). Connect the negative wire (this wire should be marked with white) into the negative inputs on the amp and speaker (the negative inputs should be marked white).

  • Connect the battery. Make sure that power is going to your amp and speaker.

  • Turn on your amp and speaker. Make adjustments.

Tips & Warnings

  • Different speakers and amplifiers will have different ways to hook them up. These steps are the most common way to hook up a 4 ohm amp and a 2 ohm speaker.
  • Disconnecting the battery is something that every one should do before doing any electric work on their car.

Related Searches


  • "Car Audio for Dummies;" Doug Newcomb and Mike Mettler; 2008
  • "Car Stereo Cookbook;" Mark Rumreich; 2005
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