The Yamaha EXi8 input expander converts analog microphone/line audio to digital and transmits the signal using Yamaha's YDIF format. The EXi8's preamps can be controlled remotely from an MTX processor via Ethernet cable.
Yamaha EXi8 Specifications:
Maximum number of simultaneously usable devices: A total of seven EXi8 and EXo8 devices. (However in a system, a total of up to 20 devices, including devices such as the MTX series and XMV series, can be used.)
Power cord length: 8.2 ft
Included items: Power cord, Euroblock plugs (3-pin, tabbed) x 8, cable ties x 8, Owner's manual
Sampling frequency: 48kHz/44.1kHz
Signal delay: Less than 2.5ms
Frequency response: 20Hz to 20kHz, -1.5dB min, 0dB typ., +0.5dB max.
Total harmonic distortion: Less than 0.05% (+4dBu, Gain:-6dB); less than 0.1% (+4dBu, Gain:+66dB)