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Need help with a 4 channel amp | chA is louder than chB

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  • Need help with a 4 channel amp | chA is louder than chB

    Hello,
    I just have few quick questions about this amplifier I got from a friend.
    Since I don't have a manual, I thought i would ask here.

    Here is my problem:
    I've connected the amp just like I have my other amp connected and when I connect a sub to chA its moving just a little bit (its only 40 watts). So, what I wanted to do is to bridge chA and chB to get 80 watts. The problem is that when I connect them, it doesn't increase the power. The sub seems to be moving the exact same way as it was on chA only. Then I connected the sub to chB only and I can barely hear the sub, does this mean that channel B is blown or not working? OR Can I somehow adjust it or something?


    It looks like this:
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  • #2
    adjust the gains?

    do you have both RCA inputs connected? some amps need both, even in bridged mode
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    • #3
      Originally posted by pulsarsimon View Post
      adjust the gains?

      do you have both RCA inputs connected? some amps need both, even in bridged mode
      well, it only has 1 pair of rca connected, my HU only has 2 outs. Should i get a splitter or something?
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      • #4
        might be the problem.
        did you check the manual for the amp?
        MacMini in an Alfa? - Why not!

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        • #5
          Originally posted by pulsarsimon View Post
          might be the problem.
          did you check the manual for the amp?
          no, i don't have a manual. I got this amp from a friend.
          I'll try a splitter and see if it works, thanks
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          • #6
            what amp is that? what sub are you trying to use? it looks like a pioneer 300 watt, 4 channel, which might not be enough to power sub (i beleive that the specs are around 75 watts max per channel)...
            My OLD 2001 Mitsubishi Eclipse GT:
            "The Project That Never Ended, until it did"


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            carpc undecided

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            • #7
              Originally posted by soundman98 View Post
              what amp is that? what sub are you trying to use? it looks like a pioneer 300 watt, 4 channel, which might not be enough to power sub (i beleive that the specs are around 75 watts max per channel)...
              You are correct, it is a pioneer 300 watt, 4 channel. The problem is that i get the same amount of power from 1 channel as from 2 (bridged)
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              • #8
                waht are the gains set to?
                My OLD 2001 Mitsubishi Eclipse GT:
                "The Project That Never Ended, until it did"


                next project? subaru brz
                carpc undecided

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                • #9
                  Originally posted by soundman98 View Post
                  waht are the gains set to?

                  Both are set to max. (i think, im gonna go check)
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