The balanced line driver will convert your unbalanced line signal (from your effects) into a symmetric signal (into your PA) to allow direct mixing and recording.
This kit is a creation by TH Custom Effects in cooperation with Musikding.de. If you have any problem with the content of the kits like mising or wrong parts, please contact Musikding (Klaus) at firstname.lastname@example.org. For any technical problem relating to building this project, please contact Thomas at diy.thcustom.com.
Here´s the parts list: Parts List (BOM)
Balanced Line Driver docs.