i'm looking to upgrade the stereo in my rock crawler. right now, my ipod is wired directly into a small memphis 100w amp. i have 2 rockford 6x9's. i just got a mtx thunder 5400x. it powers 2 left speakers, 2 right speakers and a sub. question is, how do i wire my ipod directly into this amp since it has the extra input for the sub? i don't want to run 4 speakers, just the 2 6x9's and a sub. thanks alot
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