Focusrite ISA 828 MKII, 8-Channel Microphone Preamplifier, Lundahl LL1538 input transformer, 4 DI inputs on the front, Switchable input impedance including the classic ISA 110 setting, High-pass filter per channel, Switchable phantom power per channel: + 48V, LED peak meter per channel, Expandable with optional ISA ADN8 card, 8 Microphone inputs: XLR, 8 Line inputs: 6.3 mm jack, 4 DI inputs, 8 Line outputs: Sub-D25, Housing format: 19"" 2 U