Crossfire C3 704

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I just installed a brand new amplifier crossfire c3 704 (4 channels A/B) and it seems that the speaker on channel 1 of the amplifier is not working properly. When i connect the same speaker on channel 2 on the amplifier, the speaker is working properly.
I also checked the all the rca cables from the head unit and all of them are working properly on channels 2, 3 and 4.
More specifically the channel 1 is playing the sound but is making a 'pop corn' noise.
Anybody has any idea how to fix this problem, or where is the problem?
The amplifier is brand new and all connections were done properly from the beginning.
 
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This old topic is closed. If you want to reopen this topic, contact a moderator using the "Report Post" button.