Hi again You have me totally confused, You first ask about powering the amp, you then say the radio has the original connector, and then you ask about picking up a ignition feed from the fuse box ! So do you need a ign feed or a feed for the amp ? If the ign feed is for the dab radio then this done by the Can-Bus system, and you take the output from the back for the radio, a Radio will not work like the old radio's where you have a constant 12volt feed and a switched ign feed to switch it on and off, its done by the canbus. Please explain a bit more what you want ? Radiotwo