What you are hearing about are the pcu power units... well, they work okay i suppose... low low amperage, plus quite pricy in the end. I wired a 15" in a sealed box into my dorm room this year. I had a sealed marine 12V sitting in the garage unused. What you need to do is just wire the amplifier to the battery like normal, (fused), and put the battery onto a trickle/quick charger. I've had "0" problems in the past 3 months, other than the occasional complaints here and there, but it's mainly a weekend toy. Shakes everything in the room, i put it in my closet and it somehow works somewhat like a bandpass?!