Mini expander for level control, direct outputs and master sum on the Dubmix mixer Connects via a rear ribbon cable to DubmixAdds voltage control over the levels of the 4 channel inputs.Direct outs plus a stereo return jacks allow you to configure your own aux send system using external VCAs such as a Linix & uVCATotally passive, no power needed.The Mini Expander and Aux Expander can both be connected to a Dubmix at the same time.6hp