Re: OK! 59b compared with the JB. Which it is treblier?
The 59B has more treble if treble means: extended highs and more upper harmonics.
To some, the JB might be brighter, but IMO, this is not due to extended highs and more upper harmonics...it's due to a certain "edge" to the upper mids in the JB.
I prefer the 59B...it's hot enough.
Lew