Hook up two amps in car

Pretty much all of the above references to "serial" wiring should have referred to "parallel" wiring instead.


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Serial refers to the chaining of positive to negative in a circular circuit. Parallel refers to connecting all positive wires together, and all negative wires together. I think you probably knew this, but for some reason the term "serial" keeps getting used. Any valid configuration for your amp is going to be parallel in structure, no matter how you arrange the power distribution. Didn't have that straight in my head.

Setting up two amps in car/truck

You have been a most excellent help. I will look at the wire gauge tonight when I'm outta work so I can post a specific. Just a few questions though.


  1. Power Wire;
  2. How do I Wire RCA Cable for Multiple Amps? | It Still Works.
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  6. Installing Multiple Car Audio Amplifiers?
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  8. How do you know that they can pull 85amps max? And is there some kind of resource that will tell me what gauge wires can handle what Eh so im paranoid, ive had close calls due to carelessness soo im a lot more careful now and thing dont start to smoke and props to qball for explaining exactly what i ment. Get a fuse slightly larger than that, and you're in business. Habit Sorry to reply twice, but I'm lazy and don't wanna edit. No, it's not an "everyone should know" kind of thing. It's more along the lines of damn near no-one knows.

    There is a resource - It's called American Wire Gauge. American Wire Gauge is simply a set of standards put forth by who, I forget , that outline what kind of wire you'll be getting when you buy 2 gauge wire at the store. The lower the number, the larger the diamater of the cable, and the less resistance in the cable. Here is a nice chart to help you figure out what size wire you need.

    How do I Wire RCA Cable for Multiple Amps?

    There's plenty more like that one scattered about the web. That's an interesting thought that I didn't think of: It seems like the general rule is that you double the output power to get the load, so the calculations I did before are incorrect, however I believe 2 gauge wire will still do it for you considering that chart.

    I think a 2A fuse should be more than enough for a 2GA wire. If you were using something like a 20GA wire, though, you should use a bigger fuse like a 30A!!

    Ground Wire

    There seems to be some confusion when it comes to installing more than one amplifier. Should you use one power wire or multiple wires? Do you ground everything to the same point? How do you split the low level signal? Let me share my thoughts on the topic of installing multiple amplifiers.

    Car Audio: 2 amps... 1 power cable?

    With more amplifiers you're going to need either more wire or larger wire. Personally, I prefer to run one new wire that is large enough for all of the amplifiers and any planned upgrades. The price difference between two wire gauges i. I would run one wire for several other reasons as well.

    First, it's usually cheaper than two wires in terms of material and labor costs. Since there is only one wire you only need one ring terminal at the battery post and only one fuse holder for the audio system. When using one large wire for multiple amplifiers you'll need a way to split the power wire into smaller wires for each component. I prefer to use a regular distribution block, not the fused type. They're less expensive and there's no need for the extra fuses when there is already a fuse holder near the battery that protects the main power wire you'll have to install this fuse holder.

    This assumes your amplifiers already have built in fuses that are designed to protect them. For amplifiers that do not have fuse protection you should use a fused distribution block. I often ground my components using separate ground points. I could go into all of the scientific reasons for this but it all boils down to noise. In my experience you have less chance for noise when you separate ground points as compared to using a single ground point. Certain head units may include one or several RCA outputs, providing separate signals for the front and rear speaker channels, while a third subwoofer channel will handle low frequency sounds.

    Remove the bezel surrounding the head unit faceplate to expose the removal key slots, if applicable. Refer to the installation and removal instructions for the head unit for specific guidelines needed to slide the unit out from the mounting chassis. Insert the specially designed removal keys into the removal key slots, found near the left and right side edges of the head unit.

    Slide the head unit out of the chassis to expose the available rear RCA output connections. Disconnect the antenna cable and main wiring harness from the rear of the head unit.

    Car Audio: 2 amps 1 power cable? - Ars Technica OpenForum

    Place the head unit in a safe area. Determine the wiring path for the power cable leading to the external amplifiers. Typically, power cables run from the battery, through the vehicle's firewall, underneath the left or right side interior rocker trim molding and carpet. Never run the RCA audio cables together with the amplifier power cable; run the RCA cables underneath the opposing side of the vehicle. Refer to a vehicle specific repair manual for instructions related to interior trim components and bottom dash cover removal, if necessary.