I took my system out of my car a couple of weeks ago. Everything played fine...amp never went into protect. Just put the system in my rodeo this past weekend. However sometimes...and it seems to be random the amp just goes in and out of protect. The subs kind of pop when its doing this. The amp is hooked up the exact same way as before. My voltage is actually quite a bit better in my rodeo than in my car too. In my car it dropped to 11.9 at times. In my truck it rarely gets below 13.