DIN Connector for unbalanced Audio, Stereo (older European Devices) 5-pin, 180 degree, DIN connector (DIN 41524) Pin 1 Input left Pin 4 Input right Pin 2 Ground Pin 3 Output left Pin 5 Output right DIN Connector for balanced Audio (older European Devices) 3- or 5-pin, 180 degree, DIN connector (DIN 41524) Pin 1 Signal, positive Pin 4 n.c. Pin 2 Ground Pin 3 Signal, negative Pin 5 n.c.    DIN Connector for unbalanced Microphones (older European Devices) 3-pin, 180 degree, DIN connector (DIN 41524) Pin 1 Signal Pin 2 Ground Pin 3 Ground DIN Connector for balanced Microphones (older European Devices) 3-pin, 180 degree, DIN connector (DIN 41524) Pin 1 Signal, positive Pin 2 Ground Pin 3 Signal, negative DIN Connector for balanced Record player, mono (older European Devices) 5-pin, 180 degree, DIN connector (DIN 41524) Pin 1 n.c. Pin 2 Ground Pin 3 Signal, positive Pin 4 n.c. Pin 5 Signal, negative DIN Connector for unbalanced Tape-Recorder, mono (older European Devices) 3- or 5-pin, 180 degree, DIN connector (DIN 41524) Pin 1 'Record' Signal Pin 2 Ground Pin 3 'Play' Signal Pin 4 n.c. Pin 5 n.c.    DIN Connector for unbalanced Tape-Recorder, stereo (older European Devices) 5-pin, 180 degree, DIN connector (DIN 41524) Pin 1 'Record' Signal left Pin 2 Ground Pin 3 'Play' Signal left Pin 4 'Record' Signal right Pin 5 'Play' Signal right DIN Connector for unbalanced Receiver, mono (older European Devices) 3- or 5-pin, 180 degree, DIN connector (DIN 41524) Pin 1 n.c. Pin 2 Ground Pin 3 Signal Pin 4 n.c. Pin 5 n.c.    DIN Connector for unbalanced Receiver, stereo (older European Devices) 5-pin, 180 degree, DIN connector (DIN 41524) Pin 1 n.c. Pin 2 Ground Pin 3 Signal left Pin 4 n.c. Pin 5 Signal right