This article is from the Car Audio FAQ, by Ian D. Bjorhovde (email@example.com) with numerous contributions by others.
IASCA is the International Auto Sound Challenge Association, a
sanctioning body for car audio competitions held throughout the world.
Competitors earn points at each competition, and those that perform the
best each year can advance to the finals. Prizes (trophies, ribbons,
and sometimes cash) are usually given out to the top competitors in
each class at every competition.
IASCA memberships can be purchased at your local car audio retailer, if
they are an IASCA member. You can call IASCA at 602/437-4678 to get a
list of IASCA shops in your area.