Diagram How To Install Amp To Factory Radio

How to connect an amplifier to a factory stereo

Tips for using your car'southward factory wiring

Adding an amplifier to a factory stereo often requires running a lot of new speaker wire — from the stereo to the amplifier and then from the amp to the speakers. This tin can experience similar an incommunicable nightmare. Fortunately, we have a style to get in a piffling easier.

Note: This commodity explains how to connect an amplifier to a factory stereo organisation that does non include a factory amp. A Crutchfield commodity almost connecting an amp to a manufacturing plant-amplified system will become available soon.

If you have an aftermarket stereo, you'll use a gear up of RCA cables instead of 1 of the nine-wire cables below. Refer to our commodity about adding an amp to an aftermarket stereo for more than details.

Multi-conductor cable to the rescue

Normally, you'll be installing a four-channel amplifier with speaker-level inputs. The all-time way to connect information technology to a factory arrangement is to tap into the stereo'south speaker outputs for the amp's input betoken. And so send the amp's outputs back to the stereo'due south harness, and on to the speakers through the factory wiring.

"All-in-ane" Crutchfield ix-wire speaker cable makes this easier by including the wiring for four speakers and an amp plow-on atomic number 82 all in one cable. Run two of these cables from the nuance to your new amplifier. You'll demand one for the amp's input and the other for its output. These cables will act similar a "T-harness" to connect your amp to the factory organisation.

Remove the radio to become to the factory wiring

Backside the manufacturing plant radio, you tin access all of the speaker wires in 1 place. The radio'south wiring harness delivers power to the radio and sends its output to the speakers. You'll need to identify which wire goes to which speaker. Positive leads are usually solid-colored wires, while their accompanying negative leads tend to be the same color with a stripe of a 2nd color.

Please exist aware that these wiring colors vary widely from one car to the next. If you lot purchase your new gear from Crutchfield, our Tech Support team can look upward the wire colors for you. Give us a call before you tear apart your dash, so y'all'll know what to expect.

Connect the wires

Once yous've identified each of the eight speaker wires, cut each one. Connect the cease coming from the radio plug to a new wire going to the amp'south input. Connect the end going to the speakers to the appropriate wire coming from the amp'due south output.

That means yous'll use two of the 9-wire cables, 1 for the amp's input, the other for its output.

Amplifier in/out via 9-usher cables become to the right, radio plugs in at superlative, and vehicle wiring goes left. (Even with my challenged eyesight and shaky hands it simply took me nigh 40 minutes to wire this harness for analogy.)

Forget the plough-on lead

Amplifiers that take speaker-level inputs also characteristic "point-sensing plough-on." The amp turns on when an input indicate is nowadays. This ways you don't utilise the 9th wire (the blue wire) of either cable for this installation.

Something you may demand

Sometimes after you cut the manufacturing plant speaker wiring, the radio volition shut downwards, considering it can't detect any speakers connected to it. To solve this result, you lot must install a load generating device on each output channel, and so the radio will operate properly.

Adept installation tip

Before you lot run these 2 nine-wire cables through your car, mark both ends of one cable with a piece of electrical tape. That way, once the cables are in identify, y'all'll know which of those cables is for the amp inputs and which is for the amp outputs.

Some products to help you practice information technology

Our favorite pick is the Crutchfield 9-wire cablevision shown to a higher place because each set of speaker wires is color coded. We also carry a selection of highly conductive, pure copper speaker wire, bachelor by the foot, if you adopt that.

A multi-pack of Posi-Products Car Stereo Connectors could come in handy here. Y'all can make all the speaker connections without having to solder or crimp anything. One packet will cover this task and give you a few spares.

PAC Audio offers a few vehicle-specific T-harnesses that'll help you add together an amplifier to a select number of vehicles with non-amplified factory stereos. 9-wire cable will likewise come up in handy for these installations, in gild to connect your aftermarket amp'due south inputs and outputs to the organization.

High power amps need bigger wires

For amps with more than than 75 watts RMS of output per aqueduct, it might be better to go alee and run new 14- or 16-gauge speaker wires directly from the amplifier to each speaker.

Factory speaker wires are very thin, with high electrical resistance. They can cause noticeable ability loss when higher wattages try to go through. But amplifiers of 75-watts or less aren't really affected past this. Running their output through factory wiring remains a practical and convenient solution.

Line output converters

Another popular way to connect an amplifier to a factory radio is to apply something called a line output converter. Information technology connects to the manufactory radio's speaker wires and converts the speaker-level signal to a preamp-level signal. This lets you lot use RCA cables to run that signal to your amplifier.

A line output converter offers some advantages, like the ability to sum and control signals of a multi-channel mill arrangement. So if yous're upgrading a complex system, using a line output converter might be your best option.  The speaker wire solution we've shared hither is a simpler, less-expensive alternative that will work for almost people. Read more about line output converters.

Permit us know what you lot need

This article focused on a way to simplify the speaker connections. For information nigh other aspects of amplifier installation, similar power and ground wiring, check out our Amplifier Installation Guide.

If yous take any questions almost connecting a new amplifier to your speakers, contact our advisors via chat or phone. They'll take the time to answer your questions and explain the details, then get you gear up with any you need.

Source: https://www.crutchfield.com/ISEO-rgbtcspd/learn/connecting-an-amplifier-to-a-factory-radio.html

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