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I just got into sound systems not to long ago lol so I don't know much. Why should I get a 1 Channel Amp? Why Should I get a 2 channel amp? lol and Why not?
2-channel would be for the rear speakers since they use different signals for right and left. 1-channel would go for the subwoofers since they only receive one signal. Usually if there's a 2-channel class D...it's just not bridge internally. It will still be listed as a 1-channel usually since there is only one signal.