I put a set of NYXL 45-130's on my Ibanez BTB675. It had been happily playing with DR Pure Blues strings, but I needed to move the DR's to my Yamaha TRBX605 to see if those would improve the sound over the stock D'Addarios (and they did). I was talked into trying the NYXL's on my Ibanez. And for the most part they sound good... Except last night as I'm tuning before practice, going from string 1 to 5 I hear ping, ping, ping ping, thud. ***? I know that a low B has difficulty having any character that low, but I didn't have this issue with the original crappy old D'Addarios or the DR PB's or even the temporary strings that came off the Yamaha. Could I have done something to make the string go dead after two days? Did they need to be crimped like the DR's before cutting and winding? I don't understand what happened.