i bought these subs at a really cheap price thinking that it really would not be that loud or that great of a quality. i read a few other reviews and their opinions were all over the place. i ended up purchasing the package and it was probably the best system at a very low price. it had a great box that fit in my trunk with quite a bit of room left, the amplifier was easy to use and it mounts great to the back of my seat. the sub box seems to be sealed very well so that it is all most air tight. i did have to purchase wires for the amp to go to my battery and then the actual sub wire and the battery wire. the subs pound louder than my friends $700 subs with a rockford fosgate amp and kicker subs. it is also louder than a few other systems that my friends have. the only downside is that the amp is only 250 watts power to each sub which still makes it a very hard hitting sub, but the amp over heats and shut off for about 5 minutes after playing vigouriously for like 30 to 45 minutes. this is not a big problem because you can buy a pretty cheap amp up to 1,000 watts and the subs will hit even harder. buy this system and git a better amp and you will be very happy with how much money you have spent.