This is Kevin the owner of Cj Sounds Car Stereo and I wanted to take a second to respond to this concern. First we sell alot of diffrent brands, including Diamond Audio, Cerwin Vega and many more but this system is what he choose. This was a floor model box with brand new woofers and amplifier. We warranty all of our products for one year and have a lifetime warranty on installation and even have a 90 day trade up policy! We are a family business that is out to make a profit but not overcharge anyone. But 2 -12" woofers, box, amp, wire and labor with bass knob for under $500.00 isn't a bad deal. However I do tell anyone when they walk in our store we are not the cheapest, but if you want quality work you are in the right place.Lastly, the 2500d amp is a D Class amp with a single power rail, 1 ohm stable and puts out 900 watts RMS, I have not seen or heard from anyone that has purchased this amp and had any problems...