Is 'too much preamp' fair, given at least some of that is design. There are purely passive basses, passive basses with some control over gain and cut of two or three audio ranges (possibly Sadowsky, I can't really remember to be honest, but certainly perhaps a Precision with an East P-Retro circuit), and basses who's output is probably more a function of the circuit than of the otherwise passive instrument housing it, which in my experience would be Wal, Status, and EBBM. Whether with the latter you hear to much of the preamp is a horses for courses question perhaps?