Purchase this item and get 
Remote DX Expander Hub
The DX Hub is a remote audio networking hub that can be connected to any Allen & Heath AHM-64 SQ or Avantis mixer via SLink or any Avantis mixer or dLive system fitted with a gigaACE I/O module. It provides 4 DX Link ports each carrying 32×32 channels of 96kHz audio that can be used to connect to DX expander units.
Up to 2 DX expanders can be connected to each DX Link port allowing up to 128 remote inputs and 64 remote outputs to be added to the system.
Multiple DX Hubs can be used for further expansion or for dual redundancy (dLive only)
