Eight-channel Mic Pre and optional A-D card with Dante

The ISA 828 MkII incorporates eight of Focusrite's classic mic preamps, with Lundahl LL1538 transformers on every input. Each channel has the option of mic or line inputs, while inputs 1-4 also feature instrument inputs on the front panel. Each mic pre has variable input impedance, to provide a range of subtly different sonic options when using microphones, including an 'ISA 110' setting, which replicates the impedance of the original Focusrite mic pre.

Up to 60dB of gain is available, with a further +20dB of continuously variable trim, providing a huge 80dB gain range. The high-pass filter has a fixed 75Hz frequency and 18dB / octave roll-off for minimising rumble, stand-borne noise and other low-frequency sounds. The ISA 828 MkII also features per-channel, six-segment LED meters, and switchable rear-panel insert points, which allow the use of inline processors such as compressors or EQs.

Dedicated connectors for mic and line-level inputs allow all sources to be connected simultaneously, making ISA 828 MkII perfect for permanent installation in a rack. A switching power supply allows for efficient, cool operation, without sacrificing sound quality or performance, and increasing reliability over its predecessor. The optional ISA ADN8 analogue-to-digital expansion card provides eight Dante, ADAT and AES3 outputs at sampling rates of up to 24-bit / 192kHz.And as with all Focusrite Pro products, wherever you happen to be in the world, you can rely on a three-year warranty if any Focusrite Pro hardware needs repairing or replacing due to a manufacturing fault.




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Optional A-D card with up to 192kHz, 24-bit sampling offers high-quality digital audio conversion to Dante, ADAT and AES3
Classic ISA mic preamp design featuring Lundahl LL1538 input transformer
Switching power supply design allows for efficient and cool operation
Front-panel instrument inputs to first four channels
Line inputs with dedicated input connectors and front-panel select switch
Switchable input impedance including classic ISA 110 setting
High-pass filter with fixed 75Hz frequency and 18dB/octave roll-off
Switchable insert points when used with A-D card
Per-channel six-segment LED peak-level meters
As with all Focusrite products, you'll also benefit from a three-year warranty
Brainworx bx_console Focusrite – exclusive plug-in that faithfully captures the sound, feel and styling of the original Focusrite ISA 110 Equaliser and ISA 130 Dynamics Modules.

specifications

Mic Inputs


Gain Range

0dB to +30dB (30-60 switch disabled) and +30dB to +60dB (30-60 switch enabled) in 10dB steps, with an additional +20dB of continuous trim

Input Impedance

Low = 600Ω, ISA 110 = 1400Ω, Med (Medium) = 2400Ω, High = 6800Ω

Max. Input Level

+25dBu, min gain, medium Z

Frequency Response

(10Hz - 122kHz): 10Hz - 122kHz ±3dB, unity gain, medium Z

THD + N

-91dB (0.0028%) @ -1dBr, min gain, medium Z

EIN

-123dBu 'A'-Weighted (typical)

Signal-to-Noise Ratio

122dB 'A'-Weighted (typical), medium Z

Common-Mode Rejection Ratio

997Hz CMRR: -65dB, min gain, medium Z

Phantom Power

+48V, independently switchable per channel

High-Pass Filter

75Hz knee frequency, 18dB/Octave, independently switchable per channel

Phase

Inverts the phases of the selected input

Weight and Dimensions


Weight (without accessories)

7.05kg / 15.55lbs

Weight (with accessories)

7.48kg / 16.49lbs

Height

88mm / 3.46"

Width

482mm / 18.98"

Depth

325mm / 12.80"

Line Inputs


Gain Range

-20dB to +10dB in 10dB steps, with an additional +20dB of continuous trim

Input Impedance

Low = 470O, High = 2.4MO

Max. Input Level

+18dBu, min gain, low Z

Frequency Response (20Hz - 20kHz)

20Hz - 20kHz ±0.1dB, min gain, low Z

Frequency Response (10Hz - 110kHz)

10Hz - 110kHz ±1.2dB, min gain, low Z

THD + N

-83dB (0.0071%) @ -1dBr, min gain, low Z

Signal-to-Noise Ratio

100dB 'A'-Weighted (typical), min gain, low Z

Instrument Inputs


Crosstalk


Microphone Talkback

-80dB; 20Hz - 20kHz, min gain, medium Z

Line Crosstalk


Microphone Talkback

-80dB; 20Hz - 20kHz, min gain, medium Z

Instrument Crosstalk


Microphone Talkback

-80dB; 20Hz - 20kHz, min gain, medium Z

Front Panel Connectivity


Channel Count:

2 Channels In

Instrument Inputs

4 x 1/4" jack inputs

Instrument Inputs

4 x 1/4" jack inputs

Rear Panel Connectivity


Mic Inputs

Input: 8 x Female XLR

Line Level


Channel Count

8 In and 8 Out

Input

8 x 1/4" jack inputs

Output

1 x DB-25 connectors (AES59)

Inserts


Channel Count

8 In

Input

1 x DB-25 connectors (AES59)

Digital Card Slot


Compatible Card

ISA ADN8

PSU


PSU

1 x IEC Input

Rear Panel Indicators


Control Functions

1 x Pot (Meter Trim)

Power


PSU

1 x Internal, 100-240V, 50/60Hz, consumption 35W.

Heat Performance


Operating Temperature

Operates at up to an ambient temperature of 40 degrees Celsius

Front Panel Indicators


Control Functions

16 x Pots (Gain and Trim). 60 Switches (On/Off Switch, 30-60 Gain, +48V, Phase, HPF, Insert, Z In, Input, Meters Pre A-D, Clock Select and Ext. Word Clock)

Downloads

User Guide


ISA 828 MkII User Manual - English