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Focusrite ISA828

8-Channel Microphone Preamp

Product Code: 42870

Retail Price: $3,199.00



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Focusrite’s new ISA828 eight channel microphone pre-amplifier, providing eight original ISA transformer-based pre amps in a single robust 2U chassis, offering the Focusrite signature sound at its lowest cost per channel to date.

The eight ISA-series transformer-based microphone pre amps, with switchable impedance and direct instrument inputs, are complemented by eight line inputs, eight line outputs and an optional eight channel 192kHz ADC. Thanks to its convenient 25 pin D-Type connectors, the ISA828 integrates quickly and seamlessly with ProTools HD, as well as other popular hard disc recorders and mixing desks.

The microphone input stage includes a variable impedance circuit, allowing the user 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, thus maximizing level, or to use different settings creatively to shape the sound of the microphone being used.

The four front panel instrument inputs also feature high and low impedance options to provide a comprehensive and accessible DI solution. Insert points are also featured on every channel, should the need arise to place extra processing between the pre amp and converter, Vintage design high pass filters are also provided on every channel, ideal for eliminating unwanted low frequencies without affecting the rest of the audio signal.

Focusrite’s optional eight-channel 192kHz ADC embodies cutting-edge conversion technology, encompassed within Focusrite analogue circuitry, providing eight channels of A/D conversion that boast performance figures beyond any other converter, bar none.

Finally, every channel features a six LED input meter, complete with precise meter trim. Metering has been designed to utilise the same reference points as Digidesign’s HD system and provides clear and accurate input metering independent of the DAW.
In Depth
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)

Technical Description
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

Analog Performance
Line = -96dB
Mic = -128dB (EIN with 150 ohm input resistance at 60dB of gain)

Line = 0.003% with 0dBu, 1kHz input and 20Hz to 22kHz band-pass filter
Mic = 0.003%

Analog 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

Analog 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
Item Number: Focusrite ISA828 [ISA828]    42870 1-1
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Focusrite ISA828 [ISA828]

Focusrite ISA828&nbspLarge View Focusrite ISA828&nbspRear View

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