Here is the method used to design the Mach Audio systems.
Ford throws alot of speakers and amplifiers into a car, and drive into a high school parking lot for approval.
The End.
It's really quite horrible, seriously Ford generally has some of the worst systems on the market. The Focus was decent, then the Mach audio version added a thumpy cheap sounding woofer in the hatch.
The mach 460 from cars like the Mustang and the last run of SHOs is really just loud, but also noisy at the same time.
