OK so the way I look at this page is that most of you don't know much about acoustics of different cars and the effects of different enclosures as well as system requirements. The size of the vehicle is a huge factor of the performance of the sub and enclosure. There are many other factors to take into consideration i.e. quality of recording, amplitude of recording, the deck you are using, the quality of cables (RCAs), size of power cables (grounding wire les than 12” if possible @ same gauge as power), whether the enclosure is in a trunk or behind a seat, angle of attack of which cone is facing, the height difference from cone and your ears, power in RMS verses PEAK POWER, whether the amplifier is matched for the sub, material surrounding enclosure, and many other factors. All in all you can make any sub sound better than the other. What you need to do is educate yourself on the best equipment for your application and make a very well planned out and symmetrical design before you make the decision to buy your equipment. And by the way I own MTX subs and amps with a Pioneer Premier deck, and I have had the same equipment for the past 5 years and it hits harder and clearer now than when I bought it. I have also been installing fully customized systems in many show cars and trucks for the past 8 years and have heard a lot of poorly designed systems with worn out subs.