Both Ken Smith basses I used to own - sounded like a duck passing gas. Just an annoying always-prominent, upper mid-rangey honk that could be tamed but never shaken through much EQing. As Tendollarcat stated about his AC, shockingly little bass of their own accord, again - EQ to the rescue. 
The other was a Low End Jazz bass for the same reasons - IIRC, someone on TB stated that Kent Armstrong supplied pickups for Low End Jazz at some time as well as Ken Smith basses. That could have contributed to the midrange honk I heard in that too. Either way, the preamps these basses were or are currently using were way too treble-y and definitely were was not doing justice for those pickups in either bass.
They had to go...
As far as little Fender complaining going on - IMO, it's hard to fix what ain't broken.

The other was a Low End Jazz bass for the same reasons - IIRC, someone on TB stated that Kent Armstrong supplied pickups for Low End Jazz at some time as well as Ken Smith basses. That could have contributed to the midrange honk I heard in that too. Either way, the preamps these basses were or are currently using were way too treble-y and definitely were was not doing justice for those pickups in either bass.
They had to go...As far as little Fender complaining going on - IMO, it's hard to fix what ain't broken.
I ultimately traded it for a Kramer Pioneer bass (P-Bass thingie). Suitable for wall art or as a decorative doorstop, these things now sell for a ridiculous amount of money. Who knew?