[Newold65]

Just my 2 cents but you can do as everyone has said to discover if the yellow wire will work for you as a remote wire and if you still want to have the ability to listen to your radio you can wire in a switch in line, running off of said yellow wire. That way you can choose whether or not to listen to your radio with the amp on or off and do not have to worry about draining the batt due to the fact the power will be cut once you remove the keys. I've set up alot of stereos that way so my buddies can turn off the big subs when they have kiddos in the car, and have never had any issues.