Have I bought the Pro Charger few days ago at Media Markt and am completely satisfied with the thing! Previously had the magnate BS30 in the car and that was pretty good. But simply wanted to create a new of a little more pressure. It is operated by a Renegade REN550S amplifier. It's not a high end level but sufficient for the sub from total and the sound is just amazing. For the price and the size of the subwoofer really great.