The Jensen PEQ-70X passive graphic equaliser is used for fine adjustments to a mobile stereo's audio settings. The Jensen PEQ-70X passive graphic equaliser offers more customisation than just a standard head unit. Different audio frequencies can be tweaked for maximum sound enjoyment. For example, "bass" is not just one frequency; there are a number of "bass" frequencies. Installing the Jensen PEQ-70X passive graphic equaliser should take less than an hour.
Disconnect the car's battery. This will prevent shorts and electric shock.
Remove the existing head unit (receiver) from the vehicle. Pry back the dash trim panel surrounding the head unit to expose the screws holding the head unit in the car's body. Unscrew the head unit and remove it from the car's body.
Disconnect the wire harness from the head unit.
Plug in a compatible wire harness to both the head unit and equaliser. This is not a standard wire harness. This harness will connect the car's wiring to the head unit and equaliser. This makes the process of connecting the equaliser much simpler.
Connect the preamps and subwoofer ports of the Jensen PEQ-70X passive graphic equaliser to any after market amplifiers using RCA cables. Remember to plug red wires with red ports and white with white.
Reconnect the car's battery, turn on the car and test the Jensen PEQ-70X passive graphic equaliser.