If you have no wiring diagram, look at the terminals for markings, such as "L F" Left, Front "RR" Right, rear , and connect appropriately. Most stereo wiring bundles that have speaker "pigtails" sticking out the back use standard colors for power and ground, so never attach a speaker wire to red, black, or white. Speaker wires may be color coded grey, yellow, pink, blue, green, purple, or orange, and connecting the positive speaker wires to these, and the negative wire to a ground in the vehicle should complete the circuit.

Amplifier Installation Choose a suitable location for your amplifier. Remember, the larger the amp, the more heat it will produce, and the larger the power wires will need to be.

Most vehicles do not have space in the dashboard for amplifier mounting, and cutting holes in the dashboard can cause it to crack, or damage concealed mechanisms or wiring critical for your car's operation. Determine if there is sufficient room, depending on the size of your amp, to mount the unit underneath a seat. Make sure the aluminum cooling fins are not too close to any surfaces, as these dissipate the heat generated by the amplifier operation. This is probably the most common installation, and requires running power cables from either the battery, or a relay with sufficient capacity to power the unit.

You will want to run the power wires, both positive and negative, from a source sufficient to operate your amplifier. You may find some cars have an accessory power block mounted under the hood, or on the fuse block, but if you don't have one, you may have to connect directly to the battery terminals. Either way, use the wire size, or gauge, recommended by the amp maker for length of wire you use.

Install an inline fuse near the point where you attach to the car's wiring or battery to avoid a fire if a short occurs.

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Hook the speaker output wires to the amplifier on the designated terminals, then rout your speakers wires to the individual speakers. High output amplifiers require much larger speaker wire than do original car maker's components, so upgrade the speaker wire from the amplifier to each speaker. Things You'll Need Speakers. Terminal clips, tape, or other hardware for attaching speaker wires and power cables. Warnings Make sure any new equipment is sufficiently ventilated to operate properly without damaging it, or causing a fire. Make all connections securely, especially power connections.

Use care removing any trim or panels from your car.

How to Install a Pair of New Car Speakers and Amplifier: 2 Steps

If you damage these, they can be expensive to replace. Article Info wikiHow is a wiki similar to Wikipedia, which means that many of our articles are written collaboratively.

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Is this article up to date? Cookies make wikiHow better. By continuing to use our site, you agree to our cookie policy. Can you tell us which parts were out of date so we can update them? Thank you for your feedback! Help answer questions Learn more. Run the two pairs of door speaker wires to the back of the amp and fasten to the right and left channel front outputs of the amp.

Most car audio amps use push-in sockets: Most factory-installed speaker wiring uses copper-colored wire for positive and silver-colored for negative. A few others use the same color wiring but put a raised strip on the negative side of the wire. Most car amps have 4-ohm output impedance.

Make sure your speakers are the same impedance. The impedance is usually listed on the back of the speaker and on the output terminals of your car stereo. If you replaced the factory-installed speakers, the installation manual should tell you the impedance. Turn the balance control on your car stereo from one side to the other to check the sound for balance after your installation is complete.

Install an inline fuse holder for the power line 18 inches 46 cm or fewer from the battery terminal connection. It is best to install it as close as possible to the connection. Consult the owner's manual or the manufacturer of your amplifier to determine the size fuse you should use. Run your RCA cables and remote turn-on lead remote turn on lead is the blue wire with white line from the back of the head unit to the amp.

How to install aftermarket speakers on ANY car!

Snake them through the car in the same way you did the power wire, but do it on the opposite side of the vehicle. This will prevent noise in the system. Connect the speaker wires from the amplifier to the speakers. Situate these wires away from the power wires. Connect the amp's negative terminal to the car's chassis ground.

Use a short negative power wire that is the same diameter as the positive wire that leads to the battery. Insert the main power wire fuse once all the connections for the other wires are in place. Set all of the input level gain controls to their lowest setting. Set equalizers to their center, or neutral, position if you have them. Put in a CD with music that you are familiar with. Choose something strong and clean sounding. Turn up the deck's volume until you hear distortion, and set it just below that level. If you don't hear distortion even at the loudest setting, the head unit is in good shape.

Repeat this process for the input gain, and then with all the other components. While your key and radio is on, disconnect and connect the remote wire to the amp. Not Helpful 2 Helpful 9. The balance on your radio may have gotten moved from center to right or left, or your speaker wire may have come disconnected. Check your balance first on your radio's settings. If that's not it, trace your wires to make sure they are connected. If they are, then hook up an external speaker to the radio's output for that side to see if it is the radio at fault.

How to Wire Door Speakers to an Amp

If the radio is good, it could be a bad speaker. Not Helpful 3 Helpful 8. You probably have it connected to a full time 12 volt power source, you need to connect it to a source that is only powered when the key is in the on or accessory position. Not Helpful 0 Helpful 2.