When doing a big audio system and installing an extra battery or 2, there are many more options available to you than the standard alarm install package with a kill switch. Since you do have other power supplies, some in plain site and others hidden, you can do alternatives. But if a thief wants that stereo, not much you can do to stop it except make them play on your turf. My stereo nor my truck will be stolen at home, I can promise you that. But I can't stop a thief who wants it so bad that they would follow me around till I park it in a parking lot to do some shopping and then they could simply jack the vehicle with a wrecker and make way with it. Then take it to an undisclosed location and start cutting wires until all of the alarms stop and then strip it down to bare metal. But that is about there only option. Now adays, with so many alarms on the market and everyone having one, the sound of it makes your first instinct say, adjust the motion sensers on it. Come on buddy, get with the program, LOL. I hear alarms all the time and pay them no mind. But they won't drive away in my vehicle. Nor will they spend much time in it at my house.