drotti2004
Cross-Over (XO) or internal Wiring? If you do not have a local Audio repair shop, reach out and touch Mr.Rob Gillum at coherentsoundsource.com
This is the Thiel Audio Authorized Repair Center. Phone: 859.554.9790
Give him some time to reply, he is a 1-Man Operation. You can also post this query over on Thiel Owners thread.
Happy Listening!