Does your amp have both XLR and RCA connections? If so, you might try the interconnect you're not currently using to see if that fixes the problem. Not an ideal fix, but might get you by until Outlaw resolves the issue.
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AvFan
Outlaw 976 | ATI 2005 | M&K 850s Left, Center & Right, Surround-55s, MX-70B Sub | Harmony 950 remote | Panamax 5100 | OPPO UDP-203 | LG OLED55B7