My hifonics has about 2 hours of play time. The 4 channels ran a comp set active and the sub ran at 4 ohms on a single sub. Very stout amp. It's just too big for where I want it to go. I am looking for a single or double din deck. It needs to have USB input and or iPod control. I do not want to add money on my end. It needs at least 2 sets of rcas and fully functional.