Well it plays lol, I will say so far the lithium it's **** full tilt 7k at 1 ohm while driving I'm dropping a tenth or two at most. Not sure on numbers (don't think it's a 50) really didn't play it long will probably still my meter on the windshield on the way to work set it on peak hold and see what I come up with and go from there. Definitely need some bus bars for the lithium it was a pain to wire up.