This Studer card, part number A949.0427, offers four analog microphone/line inputs for your D21m Modular I/O System.

Using this Studer card is easy. Just connect it to your D21m Modular I/O System. You can then plug your microphones or line - level devices into the four analog inputs. When using, make sure your power supply is stable to avoid signal interference. For maintenance, keep the card in a dry and clean environment. If you notice any dust, use a soft brush to gently clean it. Don't try to disassemble the card on your own as it may damage the internal components.