This article is from the Car Audio FAQ, by Ian D. Bjorhovde (firstname.lastname@example.org) with numerous contributions by others.
Many of the speakers you've ever purchased or ever will purchase have
been assembled in plants "along side" speakers from other
manufacturers, but that does NOT imply in any way, shape or form
whatsoever that the two brands are even VAGUELY similar. This is often
done in order to reduce costs because purchasing your own gaussing
stations and mass producing your own drivers takes a LOT of money to