maybe she was just trying to scare me into paying them to install it. Either way I'll get it installed and let yall know how it goes before the weekends over. Question about an alternator and extra battery. My alternator is rated at 150 amps and I have a 12v 75 ah agm battery. Would you recommend getting a high output alternator or installing the battery with the subs or am I not drawing near enough power for this to matter?