Hello. I'm working on installing my stereo in my 2007 sonata. All I need to do now is get the power cable for the amplifier through the firewall somehow. I've been looking for quite a while and can't seem to find anything too helpful. Would there be anyway to replace the stock amplifier (premium audio system) with mine? I don't want to run the speakers through the amp as they get loud enough for my tastes as it is. I just want to push the sub. Is there already an opening somewhere in the firewall that I'm not seeing? Or is there somewhere in the trunk I could just drop the cable and run it under the body?