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About this User Guide
This user guide applies to the ISA Two mic pre. It provides information about installing and using the
unit, and how it can be connected into your system.
If you feel that additional information might be of assistance, be sure to consult the site:
pro.focusrite.com/technical-support
, which contains a comprehensive collection of common
technical support queries.
Pro Tools® and Pro Tools | HD
TM
are trademarks or registered trademarks of Avid Technology, Inc. or its subsidiaries
in the United States and/or other countries.
Dante® and Audinate® are registered trademark of Audinate Pty Ltd.
Box Contents
• ISA Two unit
• AC power lead
• Safety information cut sheet
INTRODUCTION
Thank you for purchasing the Focusrite ISA Two.
The ISA Two provides two of Focusrite’s prestigious transformer-based microphone preamps, and
can be used to record microphone, line-level or instrument sources. Microphones and line-level
sources are connected via the rear panel, whilst instrument inputs can be plugged directly into the
front panel jack sockets.
The front panel also features gain, adjustable filter frequency and other settings such as phantom
power, phase and input impedance for both inputs. Peak level LED metering in dBFS is provided for
each channel to indicate when the output is reaching the digital clipping point; a meter calibration
control is provided on the rear panel.
First introduced in 1985, the ISA microphone preamp holds a reputation for outstanding transparency
along with subtle warmth contributed by transformer core saturation. The variable impedance circuit
allows ISA users to match the preamp with a wide trange of microphones.
