you can just connect red on positive and black on negative if you dotn want an amp but you will blow you sub pretty fast with no amps and it wont make good sound at all , and how would you want to power the amp if not from the battery ?
fyi : i am rocking 3 12 inch with a 1000w rms amp on stock battery and electrical system with absolutly no problems , i need to run the car to listen to it tho
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