I have a 2006 Odyssey Touring. I'm getting static noise from the speakers with the ignition off and a loud short burst of noise when the ignition is turned on. The sound is still there if I pull the radio fuse or disconnect all the harnesses from the back of the radio. The only way I can stop the sound is if I pull the amplifier fuse or the large harness from the amp. I'm thinking it's a ground short but don't know where to go from here. I may try another amp. Can anyone help with this?