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How do I hook up to 10 inch sub woofers to my car stereo when theres no rca plugs on my stereo? - car stereo sub woofer

I have two 10-inch woofer with a sub-1000-watt amplifier, I know how to connect everything up to others, but how can the RCA connectors for stereo when I was a cinch in my head equipment or system for granted. Some tips for connecting submarines would also be very grateful.