I had this EXACT same problem. I disconnect the speaker that was having a vast majority of the static, only to have the static jump to the next speaker. I called by friend who is an electrical engineer, and he said the radio has a bad ground connection, so what is happening is the radio needs to send power to the ground, it can't through the primary ground (due to a bad connection) so it's sending it through the speakers. I took the radio out, disconnected the ground wires behind the radio in the dash (there are multiple components going to the same ground point), wire brushed the contact, stacked the wires differently and tightened the bolt down real good. I have had NO problem since then. I would be shocked if this doesn't work for you.