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Thread: 2 Channel amp no headunit

  1. #1
    Variable Bitrate skippy911's Avatar
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    2 Channel amp no headunit

    Hi, Can I hook up a 2 channel amp with no headunit by combining the front left and right speakers, and the back left and right speakers and running them into the amp that way? I was given an old jensen 2 channel amp so I would like to use that. Also what is the rca part used for? I was going to just run wires from the headunit harness since its not being used anymore into the trunk for the amp.

    Any help would be greatly appreciated. And I did search but everyone seems to be using 4 channel amps.

  2. #2
    Maximum Bitrate neon_eddy's Avatar
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    yeah . you can.. just see what ohms the amp is rated, keep in mind if you run 2 speakers of 4ohms each in parallel the total ohms is now 2, this could b e bad for the amp. but if you run in series total ohms is 8 .. I'm not sure if that's bad... but I know you need to consider this.
    Shawn



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  3. #3
    Variable Bitrate skippy911's Avatar
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    Im totally clueless when it comes to car audio. How would I wire it differently for parallel vs series? And why is one better than the other?

    Thanks

  4. #4
    Maximum Bitrate neon_eddy's Avatar
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    http://www.termpro.com/articles/spkrz.html first entry in google "series vs parallel"

    you owe me $20 now too :-)
    Shawn



    Check out my web company Minneapolis Web Designer | MODx Web Design - Himmelberger Design


  5. #5
    Variable Bitrate skippy911's Avatar
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    Wholly crap thats alot of equations but least now I know the difference. The amp I have is the jensen a82. On the back it says, "12v negative ground . Use 2, 4 or 8 ohm speakers." It also says, " Do not connect right speaker negative to left speaker negative or to car body (ground). So I guess that throws out the idea of putting them in parallel right? If I put them in series will I be ok?

    THanks again and if I had 20bux to give you I would just go buy a 4channel amp hehe im poor

    Edit: I found out from ready on vwvortex that the stock speakers in my jetta are all 4ohm each. I also have tweeters will those pose a problem? The amp is a 40Wx2 stereo amplifier.

  6. #6
    Takes it in the Rear kevinlekiller's Avatar
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    If I were you I would do this : Connect Front Left , Back Left speakers in parallel (2 ohm load) ; Front Right , Rear Right in parallel (2ohm load). You conserve the the stereo sound this way , and if you put them in series you have lots less power going into the speakers( 4 times the resistance ).

  7. #7
    Variable Bitrate skippy911's Avatar
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    By doing so I would only be able to change the balance left to right not the fade from front to back, am I right? I want to hook them up to control the fade from front to back. forgive my newbiness.

  8. #8
    Takes it in the Rear kevinlekiller's Avatar
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    But that way you would have mono sound. If you prefer fade than go that way

  9. #9
    Variable Bitrate skippy911's Avatar
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    I dont want mono sound that would suck. I thought if it was done that way I could have the sound set in the middle in windows ie not all the way to the left or not all the way to the right, thus I would have sound coming out of both the left and right speakers, front and back. I am probably just confused here.

  10. #10
    Takes it in the Rear kevinlekiller's Avatar
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    Quote Originally Posted by skippy911
    I dont want mono sound that would suck. I thought if it was done that way I could have the sound set in the middle in windows ie not all the way to the left or not all the way to the right, thus I would have sound coming out of both the left and right speakers, front and back. I am probably just confused here.
    If you conect both back speakers together , than they both get the same sound.

    Same for front.

    If you plug it that way , its techicly stereo, because 2 different sounds. But its mono because we create a stereo effect earing sounds from the side of our heads, not in back and front.

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