When I tried the bass and was kind of an underwhelming experience- Sorry Uwe
First off the neck needs adjustment and has some upper fret buzz- which should be easy to fix, I dont have the tool.
You know how some basses when unplugged sparkle or ring? Well this one is kind of dead sounding, a bit muffled.
It could be the strings?
They are roundwounds
Plugged in the same issue is present when played. It's sound is not horrible but not great. The Bartolini's seem a bit sterile and the bass does not have a lot of warmth. It seemed best to played with a pic to my progish ears, with the bridge pickup dialed in, you can get a Ric like sound.
To tell you the truth your faded LP sounded a lot better to me. It had a ringing warm tone. This one does not have either.
It is a beautifully crafted bass though, and maybe it will sound a lot better with new strings, a good setup and through a nice tube amp.
Sorry for the uninspired review, just how it sounded to me