dont use a converter with a aftermarket radio because a after market head unit already does it by itself, try unhooking it, setting ur loudness to low and turn ur bass to 1 or 2 and see how it treat u, and also try switchng ur rcas to see if the noise switches to another channel. I KNOW A FEW HEAD UNIT TRICKS WHEN IT COMES TO THINGS, I DONT USE THE 12VLT( RED ) OR THE REMOTE( BLUE /YELLOW) WITH THE WIRING HARNESS SUPPLYED, I JUST GROUND THE WIRE TO SOMETHING METAL BEHIND THE STEREO , THEN TAKE THE REMOTE AND POWER WIRE AND TWIST THEM TOGETHER AND CONNECT THE ONE WIRE DIRECTLY TO THE POSITIVE OF MY BATTERY AND ATTACH A 10 AMPS FUsE TO IT AND THAT HOW IVE DONE EVERY ONE OF MY HEAD UNITS , THE HEAD UNIT WIRING HARNESS IS THE LAST THING TO GET POWER , SO IF U EVER HAVE PROBLEMS WITH UR HEADUNIT TURNNG OFF AND ON OR SOMETHING LIKE THAT I WILL BET U IT WILL FIX IT , i really think its ur converter or ur settings.