Allen&Heath iDR-8 - Manual (Page 10)

10 IDR-8 User Guide
System Processing Overview
The iDR-8 has 8 analogue inputs and 8 analogue outputs. However, it has the onboard DSP
processing for a full 16 input and 16 outputs. The extra 8 inputs and/or outputs are available when the
iDR-in and/or iDR-out audio expanders are added. Only one of each may be added. This means that
you can create an 8x8, 16x8, 8x16 or 16x16 system to suit your requirements. The stereo monitor input
and output can also be added into the matrix in a non-expanded iDR-8 to create a 10x10 system. iDR-
8 and iDR-4 units can be daisy chained together using the 8 channel wide digital expander bus to
create even more flexible systems with additional local inputs and outputs and a maximum 16x16
matrix.
The system architecture illustrating the expanded iDR is shown below: