Focusrite ISA428 MkIIFour ISA series transformer-based preampsEight-channel optional A-D converterSelectable impedanceFour front panel instrument inputsDedicated analogue insert pointsVariable high-pass Focusrite filterAccurate LED meters for every channelSterling ST69Cardioid, Omni, and Figure-8 patternsLow noise, low heat, 6205 tube circuitDouble-sided 1" all brass capsule, hand assembled and oven baked for long term stable operationUltra-thin 3-micron gold-evaporated Mylar diaphragm provides