For example, say you have a FireStudio Project and a FireStudio Tube. With driver version 3.3.1, you can daisy-chain the two units to create a 26 input system. Add another FireStudio Tube and get another sixteen analog inputs with ten microphone preamps! That’s a 42-input recording system with 28 microphone preamplifiers all in three rack spaces!!
Note that the inputs and outputs on each unit in the chain remain independent from one another, so you cannot monitor the inputs of any unit in the chain through the outputs of any other units in the chain, but you can easily create a mix within your DAW.