How to hook up a sub to factory head unit,,Question for pros???? - Dodge Challenger Forum: Challenger & SRT8 Forums
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Audio, Video and other Car Electronics Anything that pertains to the interior electronics modifications such as stereos, A/V, lighting...not exclusive to the Challenger please feel free to share

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Old 02-16-2013, 09:20 PM
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How to hook up a sub to factory head unit,,Question for pros????

Hi,,, im still trying to find an answer to this million dollar question.
How to I get full range sound out of my factory system to hook my aftermarket sub up to. The factory sub leads dont contain low freq. a 12" sub needs.
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Old 02-16-2013, 10:51 PM
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I'm not a pro but I just put this in my 2013 Jeep Rubicon and it is driving a 10" sub. Sounds great and is inexpensive. It is designed to work with amplified head units.
Amazon.com: Jl Audio Jx500/1d Mono Subwoofer Amplifier - 500 Watts RMS X 1 At 2 Ohms: Car Electronics Amazon.com: Jl Audio Jx500/1d Mono Subwoofer Amplifier - 500 Watts RMS X 1 At 2 Ohms: Car Electronics
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Old 02-17-2013, 04:28 PM
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The factory sub in the rear deck will play as low as it can. If your subwoofer isn't getting low enough, try re-designing its enclosure.
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Old 02-17-2013, 04:40 PM
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Re: How to hook up a sub to factory head unit,,Question for pros????

That is a good question. Also does anyone know if there are sub leads if the factory system didn't come with one? I can't find them if they're there.

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Old 02-17-2013, 05:00 PM
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also curious if the sub wiring is present in a car without a sub from the factory.
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Old 02-17-2013, 05:14 PM
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Pretty sure it isn't there, but if it is, its an empty circuit.

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Old 02-19-2013, 10:03 PM
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I am reading this as you want to add a sub to your factory system that doesn't have a sub line, Right? I am also assuming you want to add a amp/sub/enclosure as your goal

If you DON'T have a factory system with the Sub just tap the rear Left and Right speaker signal. It should be full range and easy to get access to. Input those into a Audio Control LC2i to pull off the sub signal that can then be amplified. If you do have the sub line you can still use the LC2i in the same way to add bass control and boost features.



Maybe if you provided some more details on what you are starting with it might make it easier to help.
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Old 07-10-2013, 03:54 PM
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NO NO,,,,guys lets not confuse things here....
i have a stock stereo BRZ with a factory sub.
I ran in-line rca converters to my rear sub to hook to an additional kenwood amp thats feeding a alpine sub.
My hunch is that the stock rear sub is fed with a built in crossover somewhere in the stock amp or deck....which intern feeds the stock sub only limited frequency's.

I know this because my same aftermarket amp and sub in another car with an aftermarket radio works like twice as good. Especially on the really low bass. These stock subs are small... there is no way its being fed full frequency range.
Does anyone here understand the concept of what I mean..... is anyone able to use a meter of some sort to see the range of freq the stock sub leads put out?

Last edited by jcurrie; 07-10-2013 at 03:58 PM.
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Old 07-12-2013, 08:38 AM
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Take your sub line and feed it into one side of the LC2i. It will use the Accubass circuitry to clean up the signal and boost the bass level. It worked perfectly with my SGII factory sub connection until I replaced it with the LC8i.

If you have a factory sub line it would be cut off at the high end and should have plenty of bottom end signal. The only thing is the factory system might roll off the bass signal at higher volume to protect the crappy factory speaker but the LC2i is specifically made for just this problem. Get the bass control knob they sell and you will be amazed at the sound you get. It is the first and last approach for adding an aftermarket sub you should try.

I have both the LC2i and the bass control unit if you are interested send me a PM.
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Old 08-20-2013, 05:42 PM
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Does anyone know if our cars have bass "roll off" at higher levels. It kinda seems like it to me.
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