Four ISA-series transformer-based pre-amps The benefits of Focusrite’s classic pre-amp topology include superb common-mode rejection, an excellent overload margin, an extremely low noise floor and super-wide bandwidth. Dedicated analogue insert points Switchable insert points are also featured on every channel, allowing routing (between pre-amp and output) to additional external processing. Accurate ‘moving coil’ peak meters Clear metering designed to catch even the fastest and most elusive of transients. Four front panel instrument inputs Instant access on the front fascia and no separate DI box required. Eight line inputs Four additional A-D converter inputs combine with the four pre-amp inputs to provide eight line inputs, routable discretely to the eight-channel A-D converter option. Eight Channel optional 192kHz A/D conversion card With the additional four ADC inputs, two ISA428’s can be used with a single ADC, providing eight channels of pre-amplification, A-D conversion and VU metering. Custom Global A-D converter ‘soft clip’ limiter Focusrite’s custom optical design protects the A-D converter by preventing ‘digital overload’. It requires that an A-D converter be installed. Switchable Impedance Ideal for mic matching or extended microphone creativity. Settings include the ‘Vintage ISA110’ setting, providing the original Focusrite signature sound. Variable Focusrite high pass filter Provided on every channel, this is the same filter as featured on the original ISA110 and the Focusrite forte console.