SSL Pure Drive Quad; 4-channel mic preamp, AD converter (up to 192 kHz / 32-bit) and 12x12 USB audio interface (44.1 / 48 kHz - 4x analogue + 8 ADAT input channels, 4 AES + 8 ADAT output channels); SuperAnalogue PureDrive mic preamp technology from the ORIGIN console; stepped-gain control with up to +65 dB gain; 31-step trim control with precise 1 dB steps; 3 modes for each preamp - Clean, Classic Drive and Asymmetric Drive; Mic/Line input switching; 4 input impedance options for mic preamps; +48V phantom power, polarity switching and tunable high-pass filter; Connectors: 4x combo mic / line input XLR / 6.3 mm jack, 4x insert return / line input Sub D-25, 4x Hi-Z / DI instrument input unbalanced, 4x line output / insert send XLR, ADAT input and output, word clock input and output BNC, USB; Construction: 19" / 2 U