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2 Channel amp no headunit

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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
    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



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

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    • #3
      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

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      • #4
        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

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        • #5
          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.

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          • #6
            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 ).

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            • #7
              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.

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              • #8
                But that way you would have mono sound. If you prefer fade than go that way

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                • #9
                  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.

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                  • #10
                    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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                    • #11
                      Ah ok guess Ill hook them up the way I described thanks to you both for your help

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                      • #12
                        If you want fade + stereo , you need another amp , than you control using potentiometers , or if the pc is 4 channel control with pc. (or use 2 sound cards and a prog that can output to 2 soundcrards)

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                        • #13
                          If I can find a super cheap 4 channel amp locally I will just use that else Ill stick with the 2 channel and my crappy onboard soundcard hehe. Having no money sucks.

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                          • #14
                            Originally posted by skippy911
                            If I can find a super cheap 4 channel amp locally I will just use that else Ill stick with the 2 channel and my crappy onboard soundcard hehe. Having no money sucks.
                            Agreed on the no money part

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