What is this?

BeN Silver Member Username: Mgbcs Lincoln, Nebraska Post Number: 544 Registered: Dec-06	Posted on Saturday, March 24, 2007 - 01:16 GMT I guess I don't understand. Anyone? http://www.bostonacoustics.com/car/car_product.aspx?category_id=17&family_id=108
Marc Gold Member Username: Van_man Boston South, MA Post Number: 2247 Registered: Mar-06	Posted on Saturday, March 24, 2007 - 01:20 GMT its a sub with out coils, moter, Used to tune in SQ apps.
BeN Silver Member Username: Mgbcs Lincoln, Nebraska Post Number: 545 Registered: Dec-06	Posted on Saturday, March 24, 2007 - 01:30 GMT OK...well I guess that cool Is it like a passive woofer>
GlassWolf Platinum Member Username: Glasswolf Wisteria, Lane USA Post Number: 11675 Registered: Dec-03	Posted on Saturday, March 24, 2007 - 03:27 GMT It's a passive radiator. takes the place of, and acts similarly to a port.