MACH 460 MEANS 460 WATTS PEAK OUTPUT,FOR 2002 MODEL MUSTANGS FORD CAME UP WITH THE MACH 1000,THATS RIGHT 1000 WATTS OF KILLER SOUND,THAT IS SPEED SENSITIVE(THE FASTER YOU GO THE LOUDER THE RADIO GETS)! I AM THE PARTS MANAGER(AND OWNER OF DHG #5275)OF A FORD STORE IN WISCONSIN,AND WE HAVE SOME OF THE 2002's HERE.AWESOME!