share page Focusrite ISA428 4 Channel Mic Preamp (Item # 47862)

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The ISA 428 Pre Pack is the perfect multi-channel front end for any professional DAW. Four classic Focusrite transformer-based pre amps with switchable impedance and direct instrument inputs. An optional eight channel 192kHz ADC, preceded by the all new proprietory Soft Limiter circuit, provides the perfect path into your Pro Tools HD system.

The benefits of the pre amp's topology include superb common-mode rejection, an excellent overload margin and, with its shared gain structure (20dB from the hand-wound transformer and up to 40dB from the amplifier), an extremely low noise floor and super-wide bandwidth (10Hz to 200kHz). This pre amp design is the cornerstone of Focusrite's signature 'warm-yet-transparent' sound and is a point of reference for any discerning audio professional.

In addition, the input stage provides enhanced control and creativity allowing you to switch between four carefully selected input impedance settings. The original ISA 110 setting is supplemented by three further impedance settings to either perfectly match the pre amp with any microphone and maximise level, or use different settings creatively to shape the sound of the microphone being used. Should the need arise to place extra processing in between pre amp and conversion, insert points are also featured on every channel.

• Four classic Focusrite transformer-based preamps.
• 8 channels of cutting-edge A/D conversion, running at up to 192kHz. Protected by proprietory optical Soft Limiter circuit.
• Switchable Impedance for unparalleled mic matching or extended mic creativity - includes the classic ISA 110 setting.
• Multiple Front Panel Instrument DI. No separate DI box required.
• Analogue insert points on every channel.
• High Pass Filters on every channel.
• New moving coil peak meters & full digital metering (dBfs)