Reference:
Y4770F
Control I/O expansion module designed for use with the 9000 Series amplifiers and can provide up to 8 channels each of input and output expansion. Since the main unit has 4 preinstalled inputs and outputs each, the control input and output can be expanded to up to 12 channels each when the C-001T is used. Weight: 100 g. Dimensions: 440 x 550 x 205 mm.