I know that we can do this easily. I have bought n NAD 1020 preamp and Carver M400a power amplifier for my home audio system. It really sounds good with my audio system and now I want to use it in my car streio. I have tried all the things, but it is not working in my car. I have seen many people using their home audio amplifier in their cars. So, why mine is creating problem. Help me.