The Multichannel Pre Pack!

The ISA 428 Pre Pack is the perfect multi-channel front end for any professional DAW. Four classic Rupert Neve-designed, transformer-based preamps with switchable impedance and direct instrument inputs. An optional eight-channel 192kHz A/D converter, preceded by the all new proprietary Soft Limiter circuit, provides the perfect path into your Pro Tools HD system. The benefits of the ISA 428 Pre Pack preamp'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 the ISA 428 Pre Pack is a point of reference for any discerning audio professional.

Focusrite ISA 428 Pre Pack At-a-Glance:

• Variable input impedance
  
• Soft Limiter
  
• Superb A/D conversion with optional card
  
• Best of past and present

Variable input impedance
The input stage of the ISA 428 Pre Pack 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 preamp with any microphone and maximize 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.

Soft Limiter
Protecting the ADC, the ISA 428's Soft Limiter opto circuit is a new design from Focusrite, entirely preventing any digital overs, while minimizing the undesirable distortion that standard limiter circuits often generate.

Superb A/D conversion with optional card
Finally, adding the new A/D converter to the ISA 428 Pre Pack gives you cutting-edge conversion technology, encompassed within pristine Focusrite circuitry, providing eight conversion channels of the highest quality, at frequency rates of up to 192kHz. Running at 96kHz allows for up to 16 (2 x 8, parallel) simultaneous digital outputs in addition to the four main analog outputs. Digital output options include dual AES/EBU, SPDIF and dual ADAT lightpipe. Full digital metering is provided for every channel, alongside new "moving coil" peak meters, designed to catch even the fastest of transients.

Best of past and present
Classic preamp technology, custom Focusrite input and limiting circuits and the very best in A/D conversion technology, the ISA 428 Pre Pack raises the bar for multi-channel recording solutions into Pro Tools HD, or any other professional DAW. Equally, it can be used as an additional set of high quality pre amps for any analogue or digital console or hard disk recorder.

Focusrite ISA 428 Pre Pack Features:

• Four classic Rupert Neve-designed transformer-based preamps
  
• 8 channels of cutting-edge A/D conversion, running at up to 192kHz
  
• Protected by proprietary 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
  
• Rupert Neve-designed High Pass Filters on every channel
  
• New moving coil peak meters & full digital metering (dBfs)

Focusrite ISA 428 Pre Pack - A great 4-channel front end for your digital rig!

Specification Detail Analog Inputs 4-XLR, 4-TRS & 4 TS. Analog Outputs 4 XLR outs Built-in Dynamics Soft Limiters only w/ digital outs Digital Inputs optional Digital Outputs optional Impedance switchable Inserts 4 Phantom Power Per Channel Power Supply Internal - user selectable 110, 120, 220, 230

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• Focusrite ISA 828 A-D Card
  A/D Card for ISA 428 / 828
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