After looking around, Progressives seemed like a good bet. Apparently brighter than the Boomers, something I wanted for the J. And also taper wound on the E, potentially waking up the E a bit?...
...Bright, but not harsh. Powerful, in a way I could describe as like a sibling to Boomers. Great output. And maybe it's just a placebo, but it certainly seems like the taper on the E help. The E sounds especially good to my ears compared to other sets E, which more often than not is a bit less lively.
As of yesterday, my Yamaha TRBX505 is dressed in burgundy, looking classy and elegant.
GHS Progressives, L8000 (40-60-80-100) + 130B:
Exposed cores on B and E:
I've been on a tone quest for this bass for the last 15 mths, and this is the first time trying anything with an exposed core, which is the one feature that kept me from trying the Progressives in the past as I was never sure about the real benefit of tapered/exposed core strings. After having done some reading on the tapered/exposed core low B strings, both pros and cons, I figured the only way to know for sure is to go ahead and try them for myself firsthand.
One thing I've been struggling with as a relatively new 5-string player is the idea that it's not easy to find a low B string that matches well with the rest in terms of tonal balance; the low B seems to have a different tonal character as it doesn't have the same clarity and definition as the other four.
As it is turning out, the exposed core is just what the doctor ordered for this particular bass. The low B all of a sudden seems to open right up as the notes on it ring out more clearly with better definition and sustain. Even the open B note is rock steady and usable. Didn't quite expect this degree of improvement. And I can tell you with certainty it's no placebo effect.
One of the things I read more often regarding tapered/exposed core low B's than anything else is the intonation issues. So, I was a little concerned about how the exposed part extends beyond the saddle by half an inch. You know what, no issues whatsoever!
Based on my initial impressions, I have a feeling I may finally have found the right match for my Yamaha. So far, so good...