I recently purchased a Wireless Rear Speaker KIit RF-WHTIB-A-C and have run into an issue where the rear left speaker will crackle at certain times (100% reproduceable). Here is a recording of what i'm hearing: https://drive.google.com/open?id=0B9T170pKk1cJZGh1ZVkybTl2eFk from deepwater horizon. When the speaker is wired directly into the receiver, everything sounds fine. I have tried changing different parts of the wiring (between receiver and rocketfish sender, between the speaker and the rocketfish receiver), and have also tried swapping the speaker and hear the same thing. The sender and receiver are about 12-15 feet apart. The volume level on the rocketfish receiver is set around 40%. Any ideas on what I can do to solve the problem?