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  1. #1
    Break's Avatar
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    Amp to Factory Head unit

    I dunno how hard it is so I figured I wanted to see if anyone else had tried this...

    Im trying to hook a new 1000W Amp to my Factory head Unit in a 2004 TJ

    Any help is appreciated

    Thanks in advance

  2. #2
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    If your amp has a high input, you're all set. Just split off your rear speaker wires and run that into the high input. Simple as that
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    I've thought about doing that myself. I've already replaced the factory speakers with some Boston Acoustics and still want more. However, hooking an amp up to the factory head unit...do you really want to amplify the signal coming from that? Will it sound like crap? And what about that factory sub? Is it worth hooking up to an amp also?

    So many questions.

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    Has anyone ever hooked an amp up to a factory stereo?

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    I just did :)

    What you need

    Amp Installation Kit - 24.99
    Splitter - Best Buy - Less than 10.00
    Speaker Wire - 3.99

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    Quote Originally Posted by Break
    I just did :)

    Details, Details. How hard was it? How's it sound? Did you use the factory speakers?

  7. #7
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    to add an AMp to a factory head unit and accually have it sound better, there are two methods..

    The old school method (which would be best IMHO) is to also buy a 3 way cross over, wire you front and rear spreaker wires from the back of the reciever to the crossover in proper phase, this will give you the ability to convert your signal into # different levels of Htz 100 and up Your "Highs", 30-90 "Mids" and 0-30 "Lows" This also will convertthe signal to a RCA style out put so that it can be wired into the Amp with a lot less RF interference.

    Down side is that this method is a little pricey.

    The second would be to use Low Pass Converters, they are cheap and effective, but do not seperate the different levels of sound, that are also very linier sounding and do not allow your to fine tune your music. they will also allow some RF interference. these are the type of converter that gets tapped into the speaker wires behind the radio and have two RCA outputs on the other side.

    Most amps do not have line level inputs anymore (just attaching speaker wire) the older amps that did have these were not that great cause of the amount of RF interference that they allowed.
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  8. #8
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    JPS Has it down....

    But at any rate I also hooked up the amp to a subwofer forgetting the amp was 1000 watts and the sub 800... The Result = New Sub....

  9. #9
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    Re: Amp to Factory Head unit

    That should not blow the sub. Believe it or not, most subwoofer failure comes from not supplying enough power. it has to do with the different methods of rating the RMS watts and the peak watts of each .
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    Re: Amp to Factory Head unit

    Quote Originally Posted by jps4jeep
    Believe it or not, most subwoofer failure comes from not supplying enough power. it has to do with the different methods of rating the RMS watts and the peak watts of each .
    Right-o.

    1. If the amp has a gain control, turn it down. Same goes for that line level adapter you used to hook up the amp.
    2. When it sounds like the speakers are not handling the power, it is actually the amp "clipping". It is distorting the signal sent to the speakers because you are trying to get more power out of it than it is capable of. What it is doing at this point is putting DC voltage through the voice coils of your speakers. This is why your sub(s) are fried.
    3. The amp you have doesn't put out 1000 watts. I'd be surprised it if put out 100 watts clean if it is a cheap one.

    Your factory radio probably puts out a distorted signal when you try to play the system loud. This only makes matters worse.

    I've never been a fan of trying to make factory head units into "systems". That is the first thing that should go when you want to improve your stereo.

  11. #11
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    Re: Amp to Factory Head unit

    at any rate... the sub was returned and I got a 1200 watt Sony Xplod... yes I know... Xplods are bad but there are those of us on a budget... the sub works fin now and pounds its little heart out... I have intentions of buying another :)

 

 

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