Focusrite ISA828 High Grade Mic Preamp


SKU: ISA828 Categories: , ,

The Focusrite ISA428 is a high grade 8-channel microphone pre-amp developed by Rupert Neve to deliver a clean and warm sound. Capable of support a range of signal types including mic, line, and more. Perfect for professional studio environments.

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Focusrite ISA828

One of the most cost-effective ways to enjoy the benefits of Focusrite’s classic heritage sound is with the Focusrite ISA828. Including 8 Focusrite transformer-based mic preamps in a compact 2U package. Along with front panel instrument inputs and rear panel line inputs. Based closely on the original Rupert Neve design, the Focusrite ISA828 preamps deliver that sought out warm and full sound. So if you use a significant number of microphones at once, the ISA828 offers the ideal solution.
Making just one change to the design, the ISA828 adds three additional input impedances to the original vintage ISA110 setting. Ranging from low to high impedance, the four settings allow you to get the very best sound out of a vintage mic. After all, that’s exactly what the ISA828 was originally designed for. While also giving you the clean, transparent sound you’d expect from the microphones of today. There’s also a vintage design 75Hz / 18dB per octave high pass filter on each channel, giving you detailed control of the bass end.
Not to mention, 4 front-panel direct instrument inputs are also provided. Offering high and low impedance settings for extra versatility. While the input side of the ISA828 is rounded out by eight TRS rear-panel line inputs.  There’s also an optional 8-channel A/D converter available with 122dB dynamic range and sampling of up to 192kHz. Plus an insert on each channel that lets you know exactly what’s going on with LED meters, using the same reference points as Pro Tools.
Above all, the ISA828 makes the perfect match for any of your favourite microphones.


  • Eight ISA series transformer-based preamps
  • Optional eight-channel 192kHz A-D converter
  • Interface easily with Pro Tools and other systems
  • Supports instrument, and line inputs
  • Inserting available on every channel
  • Switchable impedance (low, ISA110, med, high)
  • High pass filter, polarity reverse and phantom power
  • Eight Lundahl LL1538 mic input transformers


Preamp Type Solid State
Number of Channels 8
Frequency Response 10Hz-110kHz
Phantom Power Yes
Analog Inputs 8 x XLR (Mic), 8 x 1/4″ (Line), 4 x 1/4″ (Hi-Z), 1 x DB25 (ADC Inputs)
Analog Outputs 1 x DB25 (CH 1-8)
Digital Outputs Optional A/D expansion card available (digital DB25, optical)
Clock I/O 2 x Word Clock
Rack Spaces 2U
Dimensions 484 x 85 x 305 mm
Weight 8.84 kg
For more information, please visit the manufacturer's website.