PAC AOEM-FRD24 Add-On Amplifier Interface with 24-Pin Connector for 2005-Up Ford Vehicles Interface that Allows the Replacement or Addition of an Amplifier in Select Ford Vehicles without Factory Amplified THX Sound System Interface is transformer isolated Provides 2:1 gain and infinite attenuation Linear from 20-20,000 Hz.Not compatible in vehicles equipped with the THX or Sony amplified systems Input connectors plug into factory stereo and vehicle harness Interface that allows the replacement or addition of an amplifier in select ford vehicles without factory amplified thx sound system Interface is transformer isolated Maintains phase Linear from 20-20,000 Hz Provides 2:1 gain and infinite attenuation