Steinberger strings

[fryer]

Hi, I have just bought a Steinberger Spirit 5 string ( from basschat of course ) . The strings are roundwound, gauge 40 to 125 I think. But it buzzes a bit, especially on the lower strings.

I guess there is not much choice of strings for this bass, but would flatwounds ( if available ) reduce the buzzing, or should I go for a different gauge ?

Do lighter gauge strings need to be tighter, and would this help ?

[Kiwi]

The truss rod probably needs to be tightened to introduce a little extra curve into the neck.