Thanks guys, very much appreciated. I already tried playing around with the EQ but it really changes the overall sound (surprise!😉) and should not be the solution to this problem. And I dont think it really solves the dynamic issue at all. The acoustic sound of the guitar (and in particular the G-String) is fine so it should not be an issue with the hardware (saddle) either, I guess. I, thus, would think it has to do with the contacts as garthman suggests. I am not a great technician and cannot repair, so I will just return the guitar and see whether I can find a different one.
Thanks again,
Regards
TT