I had similar questions before buying my one. It has the Tone Pump Jr. electronics that sounds very impressive for rock and heavy. After 2 weeks the battery needed to be replaced for that you must remove the back cover with 6 screws. Because of this and to play among acoustic instruments I...
I had the second KM200 that blew the fuse from the same friend. So I tested the circuit on a dummy load. The lamp works as a soft limiter during shorter peaks as the L type fuse breaks. - Well made!
In dance music dancers need the kick to stay in rythm. That gets extended and connected to harmony by the bass. Generally the drum is the engine and the bass is the flywheel. We together keep running a harmonic movement.
"It looks to me like the 4 poles in the D+G section of the pickup are more heavily magnetised compared to the 4 poles in the E+A section."
At an older Japanese P-Bass the same found.
Also engineer.