The Ultimate Car Audio App is designed to bring you the most accurate tools, calculators and information, right to your phone. It is currently the number 1 car audio tool, car audio calculator and box building app on both iOS and Android app stores! This app is designed to do the following: Single/Double Subwoofer voice coil wiring. Subwoofer Cone area. Amplifier power suggestions. Car electrical system suggestions. Subwoofer box calculators Kerf Calculator Ohms Law calculator Tone generator Sweep generator Probably more, I'm bad at documenting Ideas? Email: [email protected]