Focusrite ISA 828 User Manual

Getting Started and Powering Up
The ISA 828 is a high quality eight-channel microphone preamplifier, which can be used to record microphone, line-level
or instrument sources. Microphones and line-level sources for all eight inputs are connected on the rear panel, whilst
instruments are plugged directly into the front panel (inputs 1-4 only). The front panel also features level controls and
other settings such as phantom power and impedance for each of the eight analogue inputs. LED metering is provided on
each channel in dBFS, to indicate when the level is reaching the digital clipping point, with a dial on the rear panel for
calibration.
If wanting to maintain pristine Focusrite quality in the digital domain, an optional digital output card can be installed, for
connecting an AES, S/PDIF or ADAT™ signal directly to the DAW. With the card fitted, the clock sample rate and sync
source can be selected with switches on the front panel.
A 2-way switch labelled
Power supplies power to the unit, providing the supplied IEC mains lead is connected to the
input on the rear panel. Make sure that the ISA 828 is turned on before powering up any devices connected to the
outputs.
The IEC mains lead supplied with the unit should have the correct moulded plug for your country. The wiring colour code
used is:
For units shipped to the USA, Canada, Taiwan and Japan:
Live - Black Neutral - White Earth – Green
For units shipped to any other country:
Live - Brown Neutral - Blue Earth - Green and Yellow
4

Focusrite ISA 828 Specifications

General

Gain	40 dB
Control type	Buttons, Rotary
Sample rates	48 - 192 kHz
On/off switch	Yes
Phantom power	48 V
Product color	Black
LED indicators	Power, Signal strength
Built-in display	No
Total Harmonic Distortion (THD)	0.002 %
XLR inputs	8
6.35 mm (1⁄4-inch) input	4

Weight and Dimensions

Depth	305 mm
Width	484 mm
Height	85 mm
Weight	8840 g