I heard a rumor that a magnetic-wrap version may be in the works.
Whoops. I just learned that pure nickel is magnetic.
Anyway, I have not had a chance to use these with an amp, but I can say on an acoustic bass, played acoustically, these are the best strings I have played, and I have tried a lot of different string types and brands on the acoustic bass. In fact, playing acoustic is when I started to notice the difference in tone with respect to the different number of wraps on a string. A while ago I determined that balanced-tension was the way to go for tonal consistency on an acoustic, played acoustically (my jury is still out on whether this is the case on electric or amplified acoustic; it's complicated, and I may need a new amp).
However, with every previously available set, I ran into what was usually a relatively twangy single-wrap G and/or a relatively dark/muted 3-wrap E. This issue is now gone with the Balanced Nickels. The difference is quite noticeable. The tone is great, and consistent across all strings.
but do you prefer BN’s or Precision Flats on your basses? And which one suits the sound of single coils more?