Learn how to wire your sub and amp with our subwoofer wiring diagrams. Learn how to properly connect your car subwoofer and How do I wire up my subwoofers to. After you have your subwoofer system set up, you will hear much better sound from your stereo. This process will work with most stock stereos, and all aftermarket stereos. It can be modified to work with all stock stereos, but you may need a few more parts. I i just got a new watt car amp but i want to hook it up in my bedroom i have been looking everywere for converters from volt to 12 volt dc 40 amp but i have had NO LUCK so i was wondering what all i need to do this, if i'm on the right track or not. i know i have to find a converter that will knock my volt down to 12 volts but do. Francisco, The number of channels needed for a digital sound processor depends on how many speakers you want to run and how many output channels your receiver or factory amplifier has. What do I do? Cori, Check our Car amplifier installation guide and our How to install a car amplifier video. I have 2 Sony 12" watt Subwoofers. Start by finding an opening in the car's firewall. Corey, You can definitely hook up each of those speakers to a separate channel of that amp, that'll be the preferable way. How to Install an Amplifier and Subwoofer In A Car What you think cud possibly be the issue? This would be used with my speakers that I already have as well. Make sure a large fuse is in the fuse holder. Hooking up cadillac sts 05 amp and 10" sub would love some info on what wires to buy and where, thanks. Thanks for a identical frank component.