How to Hook Up Four Speakers to a Two Channel Car Amplifier


Measure and cut four strands of speaker wire with wire cutters. These strands will link your amplifier to the four speakers.


Strip approximately 1/2 inch off the insulation, using the wire cutters, from each end of the speaker wire. Do not strip off the copper wiring. Notice that the copper wiring separates into a negative and positive side. These two separate strands within each length of speaker wire must be separated before wiring to the amplifier.


Separate the positive strand from the negative strand on one end of each length of speaker wire. Separate them enough so that the speaker wire can reach both the negative and positive terminals on one channel of your amplifier. It's important to leave the other end of the speaker wire intact because you will need to connect a Faston connector to that end to install it to the speaker wire.


Crimp Faston connectors to the copper wiring on the other end of each length of speaker wire and slide the Faston connector over the terminal on each speaker. When you finish, each speaker wire should be connected to its own speaker.


Connect two speakers to channel one of the amplifier. Do this by wiring the positive strand of each speaker wire to the positive terminal on channel one of the amplifier. Wire the negative strand of each speaker wire to the negative terminal of channel one of the amplifier.


Finish the wiring process by connecting the other two speakers to channel two of the amplifier the same way you did it in Step 5.

At first glance, it may not be obvious that a two-channel car amplifier is capable of powering four speakers. However, using a wiring technique called parallel wiring, the audio enthusiast can wire multiple speakers to the same channel. The procedure is nearly identical to wiring a single speaker to the one channel but requires the technician to wire both speakers to the same polarities on the same channel.