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Focusrite ISA 428 Pre Pack
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 to use different settings creatively to shape the sound of the microphone being used. Should the need arise to place extra processing between pre-amp and conversion, insert points are also featured on every channel. Protecting the ADC, Focusrite's Soft Limiter is a new optical circuit design, entirely preventing any digital overs, whilst reducing to an absolute minimum the undesirable distortion artefacts that common limiter circuits typically generate. This limiter requires the optional ADC to be fitted in order for it to operate. The ADC embodies cutting-edge conversion technology, encompassed within Focusrite circuitry, providing eight high quality conversion channels, at sampling frequency rates of 44.1, 48, 96 and 192kHz. Running at 96kHz allows for up to 16 (2 x 8, parallel) digital outputs.
Digital output formats are dual 9-pin D-sub (AES/EBU, SPDIF) and dual ADAT light-pipe. Full digital metering is provided for every channel, alongside moving coil peak meters, designed to catch even the fastest transients. A second ISA428 analogue unit can be connected utilising the four extra ADC input channels on the rear of the unit containing the optional ADC. This makes full use of the eight channels provided and expands front-end capacity from four pre amps and eight digital outputs to eight Pre amps and eight digital outputs.
$ 1750.00
(save 37% off RRP)
(shipping $30.00)
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Specifications Inputs
• Transformer-based ISA design
• Gain range: Line = +/- 18dB, Mic = 0 to 60dB (both in 6dB steps), Inst = +10 to +40 dB variable
• Input impedance: Line = 10k ohm, Mic = Variable - 600, 2k4 and 6k8 ohm + original ISA 110 settings, Inst = >1M ohm
Analogue Performance
• Noise: Line = -96dB, Mic = -128dB (EIN with 150 ohm input resistance at 60dB of gain)
• THD: Line = 0.003% with 0dBu, 1kHz input and 20Hz to 22kHz band-pass filter, Mic = 0.003%
Analogue Input and Output connectors (balanced)
• D.I inputs: 1/4 inch Jack (unbalanced)
• Mic inputs: XLR (balanced)
• Line: TRS Jack (balanced)
• Insert Sends and Returns: TRS Jack (balanced)
• Additional ADC inputs: XLR (balanced) Line level
• Analogue Outputs: XLR (balanced)
Digital Output Option
• AES/EBU and S/PDIF dual 9-pin D-types
• Optical - ADAT Lightpipe
• Bit depths 16-, 20- or 24-bit
• Frequency options 44.1, 48, 88.2, 96, 176.4 and 192kHz
• Clock options Standard or ?256 x?
• Meter - 0 dBFS = +22dBu
• Digital Performance
• SNR - 120dB A-weighted
Weight
• 7.36kg
• 16.2Ibs
Dimensions
• 484mm (W) x 85mm (H) x 250mm (D)
• 19" (W) x 3.5" (H) x 9.8" (D) |
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