Audio System X–ION 200 Golf V High-tone adjustment

Hi! I just bought the 3-way system from Audio System and now there is the possibility at the FW to tweak the individual cables to adjust the high-tone range. Does anyone have experience? Is it necessary, if so which cable is recommended? I hear mainly Techno, so the heights are already important, but I have already heard that the audio system should sound partly very shrill. Greeting rv112