Focusrite ISA828 Eight Classic Microphone Pre-Amps Eight ISA series transformer-based preamps: in a single robust 2U chassis, offering the classic Focusrite pre at its lowest cost-per-channel to date Optional eight-channel 192kHz A-D converter: embodies cutting edge conversion technology, the best A-D performance on the market, bar none Interface easily with Pro Tools and other systems: 25-pin D-type connectors allow quick and seamless integration with Pro Tools | HD, as well as other popular hard disk recorders and mixing systems Inserts available on every channel: Allows external devices to be inserted between the preamp and the A-D converter, using a 25-pin D-type cable Switchable impedance: selectable per channel; four input impedances, including the original ISA110 setting, to suit any microphone; 2-year limited warranty on manufacturing defects