To install Subs and amps to the Mach 460 you need a step down kit available from the stereo stores. Attach the step down to the rear amps. I use Bazooka EL1500 powering (2) 10" MTX6000. speaker boxes must also be custom made for the manufacturer's suggested cu. vol. (ex. .77cuft for MTX6000) Th box can not be taller than 11" in a '99 - '03.
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