Kicker n. : One who, or that which, kicks.

Example:
What is the difference between a Kicker amp and a bass sub system?

Taxonomy
KICKER, Livin, Earbuds, Car Audio, Products, Headphones, Stillwater Designs, Boxes, iPod, Subwoofer, Zune, Car Stereo, Speakers, Amplifiers, Warranty Support, Car Speakers, Personal Audio, Marine Audio.

Defination from the web:
Offering a line of car audio products that includes amps, speakers, head units, and more.