This Studer card, part number A949.0427, offers four high - performance analog microphone/line inputs.

To use this Studer card, first make sure your D21m Modular I/O System is powered off. Then, carefully insert the card into the appropriate slot. After that, you can connect your microphones or line - level devices to the four available inputs. When powering on the system, ensure a stable power supply. For maintenance, keep the card in a clean and dry environment. Avoid touching the connectors with dirty hands as it may cause poor contact. If you encounter any issues, check the connections first before seeking further assistance.