Just found out that after hooking it up, testing it before I final the install, that 2 of the 4 channels only work....whatta dissapointment. I bought the unit about a yr and 1/2 ago and just now getting around to it. Had it sitting in my garage ever since. And of course, my fault for not checking it when I first got it just to be sure everything works. Awesome deck, I'm just at a loss right now. Or send it out to get it repaired??