Interesting thread as I had a similar situation with a 32' pair of NBS Statement II XLR. All was fine except for a very slight middle frequency hum. NBS said they "can not" reterminate this but was more than happy to "upgrade" to a new Omega cable for a lot more $$. I said forget it and sent the cable to Drew at Moon Audio who did a phenomenol job of taking the cable down to 14' (with no hum) and then making me (2) 6' pairs and 2 (3) pairs. It is not factory work but who cares as I now have my entire system using this cable and it is outstanding. I do not imagine changing this for years and years ..... if ever! So you might want to look up Drew at Moon Audio.
John
John