I'm running one for my CDT m6s in the doors, one four channel for my tweeters and another 4 channel for the 4 speakers in my rear deck, and a 4000 watt rms for my solo x 18. I have an alpine headunit that allows for one rca connections. Can I use a y adapter and distribution block ? Total watts 4000 rms at 2 ohms and 900 rms at four ohms. what kind of electrical system do I need ? Thanks