This Studer card (Part Number: A949.0427) offers four analog microphone or line inputs, a great addition for your D21m system.

Using this Studer card is easy. Just connect it to your D21m Modular I/O System. Then you can plug your microphones or line - level devices into the four analog inputs. When using, make sure the power of your system is stable to avoid signal interference. For maintenance, keep it in a dry and clean environment. Regularly check the connection ports to ensure they are not loose or damaged. If you have any problems, consult the Studer customer service.