Boston Acoustics subwoofers are built to perform.  They have something for everyone including the G1, G2, G3, and G5 subwoofers.  Boston Acoustics also developed the SPG555 oval subwoofers.  Why oval?  This design compares to a 12" subwoofer but can fit into the space of a 10" sub.  The oval shape also means more surface area, more surface area means more air movement, more air movement equals head pounding bass.  The SPG series was designed around a powerful yet lightweight neodymium magnet so you wont have to bog down your car with extreme heavyweight subwoofers and boxes to get loud bass.  From Pro audio enthusiasts to entry level systems Boston Acoustics has the subwoofer to fit your install.