For years, I've read that this specific brand, or that specific brand of strings outlasts all the other brands in retaining a bright tone, or a fresh string sound, or simply keeps their tone the longest. At one time, I was a big fan of brand new set roundwound's "zing", and during those many years, I never experienced any noticeable difference between of brand from the other. I'm referring to nickel plated roundwounds, as those are what I personally prefer, and roughly a month to 6 week's use was what I could get. Then, I bought a set of Infeld Superalloys. They don't come fresh out of the package super bright, per se, but they kept their tone, for me, for better than a year. Which WAS incredible. Did their sound change at all during that time? Yes, but their overall sound remained very good IMO. I had much the same results with Fodera Nickel Roundwounds. Their tone changed some over time, but it remained very good. So these two brands for me, really stood out. So what is it the Infeld and Fodera do during the string making process differently? Or are their materials of higher quality? I've always tried to be mindful on regularly wiping down my strings, washing my hands before playing, etc, and still I never noticed any brand being superior in that regard, -besides Fodera or Infeld, that is. Bear in mind, I haven't tried every brand. I've meant for many years to buy a set of DR's, which I've read many positive comments about regarding their long life. Now, over probably the past 10 years, my tastes on tone has gone to a rounder, less bright tone. And I've found GHS Pressurewounds to be my ultimate set of strings. I'm also a longtime happy user of GHS Bass Boomers, which for me keep a useable tone as long as most of the other brands, if not longer, now that I don't prefer a super bright sounding string. Could the reason for my success with Superalloys (and now Pressurewounds) be because their outer wrap is Alloy 52? I doubt that one string company has a "Secret" or greater knowledge than the other established companies. This stuff isn't rocket science. I'd really like to hear folks' thoughts on longetivity of tone when it comes to nickel plated roundwound bass strings.