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How do you wire an amplifier in a car?

Updated: 10/23/2022
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Jaljam26

Lvl 1
10y ago

Best Answer

Get a wiring kit online or from a local electronics store that sells car audio.

*Power wire (typically red) from the battery to the positive terminal on the amp routed through the firewall and try to put it under the carpet to get it out of the way so it doesn't get pulled on. Also, make sure there is a fuse on this wire. If there isn't, your amp could draw too much power and burn up. Or if the voltage regulator in the car goes bad, it will start spitting some crazy high voltage and damage the amp.

*Ground wire (typically Black) from the ground/negative terminal on the amp to somewhere on the chassis of the car. If it's in a pickup, hook it up to one of the bolts that holds the seat on. In a car, I've used the bolts that hold your tail lights in place. Or you could drill a hole in the chassis and make your own. You generally want your ground wire to be as short as possible. Most electrical problems are caused by a faulty ground.

*Remote wire (typically a really small blue wire) from the blue wire sticking out of the back of your deck to the remote terminal on your amplifier. Route it with the power wire at some point after the power wire comes through the firewall.

*RCA wires (Red and White plug ins, same style as what you use on a TV) from the RCA output on the back of your deck to the RCA inputs on the amp. Red goes to red, white goes to white. If you screw that up, don't worry. It's supposed to differentiate between left and right channel, but with subs, it makes no difference. If it's a amp for your normal speakers, don't screw that up. Route these with the power and remote wire.

*speaker wire going from the positive and negative terminals of the amp to the positive and negative terminals on the subs.

Turn the gain down on the amp, turn the stereo on, and slowly increase the gain until it hits desired volume level and you're good to go.

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Q: How do you wire an amplifier in a car?
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