Well, it sounds like this popping was not due to the remote wire, and is due to something else, so we can do some troubleshooting and figure out what isn't playing nice.
If you disconnect the RCA inputs from the amplifier, and leave everything else the same, does the popping still happen?
What about with the RCA cable reconnected, and the speaker level input connector to the LC2i unplugged?
musicar northwest portland or musicarnw.com
Web site migration complete, still repairing problems. Sorry!