Back then, I was hired to do sound for 3 different bands by a bassist (and PA owner) who played a custom build by Ed Reynolds (then of Soundsmiths in Chicago, now of Ed Reynolds Guitars in Austin). It was a modified Fender shape; a bubinga body on a 3-piece maple thru-neck with an ebony 'board sporting MOP oval inlays (is any of this sounding familiar?). It had Barts with 3-band active EQ, and it was absolutely killer - enough so that when (between the 1st & 2nd of said bands) I helped another bassist I was working for design a redo on his fretless P-bass, and convinced him to go with P-J Barts & active 3-way (installed by Ed). Had I been as knowledgeable then as I am now, I probably would have steered him toward Activators, but the Barts were wonderful. My guitar tastes tend toward old-school (Leo & Ted did pretty good there), but I would not hesitate to put Bartolinis in any bass.
Except an Alembic. If Barts are the Porsche of bass p/ups, Alembics are the McLaren.........................
Peter