I have the AA-GM44 Pac line out converter. I want to set my gains right on my amp so I won't blow my sub. I have set my gain on my amp with a multimeter and with 1500 watts at 2 ohms I read a AC voltage of around 55 at a 50hz tone but with my gain all the way up it only reads to 48 AC volts . Should I keep this gain all the way up if it's showing its not giving enough? Or should I match the gain with the voltage output of the radio? What is the cruze's radio voltage output? Or does the PAC have a voltage output I should match. Please help