I have a simple sound system in my car, 4 JL speakers, tweeters, kenwood stereo, infinity amp hooked up to my speakers and my 10" JL sub. My dad doesn't use his JL 12" sub with a JL mono amp hooked on top of the box so I'm going to hook it up in my car. I know this might sound easy to any of you but I would like to know/learn from you how can I hook up the extra sub with the mono amplifier to my current system. And also how many ohms each sub should be running on and all that. Any ideas would be greatly appreciated.