I agree 100%! They DO sound more similar to the other roundwound strings on the market! The old version had quite a different sound. Especially when they were fresh out of the package. More of that “Piano String” effect.
And I’ve also heard that the folks at Rotosound say they haven’t changed, but I disagree. I even remember way, way back the local bass players that I looked up to complained about how abrasive the dull gray version were on fingers and frets. And they used to call Rotosounds “Unfinished Roundwounds”.
I still hear more midrange detail from the current Rotosounds that I don’t hear in D’Addario XLs or Ernie Ball Slinkys.
I feel the current version of the SB66’s really don’t sound drastically different than the GHS Bass Boomers that I’ve sworn by for the last decade or so. Bass Boomers also have a midrange quality, but it’s more centered in the low mids, whereas the SB66’s have slightly more high mids and top end. Their low end sounds very similar to Bass Boomers, IMHO.
So what you’re hearing from the current SB66’s is very much the same things that I’m hearing. And for me, I guess their similarities to GHS Bass Boomers in the midrange is why I’m liking them.
I definitely remember those dull gray SB66’s, -fresh out of the package, had more top end. They almost sounded “Springy”. And that top end went away rather quickly. Like within the first few days. But for me, their broken in sound was still very good.
The broken in sound of the current SB66’s are quite good too, IMO.
Take Care!!!