My work requires a small PA system just for voice, but there is no AC power source nearby. I need the system to be as small and light as possible and I need a wireless headset mike. I ordered a Crate Taxi amp which has it's own 12 volt rechargeable internal battery. I'm looking at the Sansom Airline headset wireless mike system where the mike reciever does require 110 AC which is then converted to 12 volt DC. I realize that I could get a 12 volt battery and an inverter and plug the mike's reciever into that, but that would be too much stuff to carry. My question is: Could I get the appropriate connectors from Radio Shack and make a cable that would go from the 12 volt in jack of the Amp to the 12 Volt in jack of the mike reciever and thus provide power to the mike from the amps battery?