the t.racks FIR DSP 408, Digital Speaker Management System, With FIR filter, 4 Inputs 8 outputs, 96 kHz sampling rate, 32-Bit DSP, 24-Bit AD / DA converter, XLR inputs and outputs, USB and RS232 / 485 interface, Ethernet interface, Easy to read display, Format: 19""/ 1U, Installation depth: 24.7 cm