With factory non-rca HU you will hook up ground, run a minumum 12 gauge power wire from battery. you need to splice into the rear speaker wires, run them to the wires on the bazooka harness. It will power up automatically when it senses signal.

Set the crossover to appx 80Hz, and adjust the level to whatever sounds best.

The bazooka is VERY sensitive to where the end of the tube is, and likes to corner load.

John C.