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

  1. #1
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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:

  2. #2
    Low Bitrate pulsarsimon's Avatar
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    adjust the gains?

    do you have both RCA inputs connected? some amps need both, even in bridged mode
    MacMini in an Alfa? - Why not!

  3. #3
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    Quote 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?

  4. #4
    Low Bitrate pulsarsimon's Avatar
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    might be the problem.
    did you check the manual for the amp?
    MacMini in an Alfa? - Why not!

  5. #5
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    Quote 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

  6. #6
    MySQL Error soundman98's Avatar
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    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)...

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    Quote 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)

  8. #8
    MySQL Error soundman98's Avatar
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    waht are the gains set to?

  9. #9
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    Quote 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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