1.1 Introduction
Thank you for purchasing the Sound Barrier iUSB400. Sound Barrier has designed the IUSB400 utilizing
high-grade components to ensure optimum performance that will last a lifetime. Loaded with 2 high-
headroom, microphone preamplifiers; professional 24-bit 96 kHz converters; a built-in 2x2 USB 2.0
recording and playback engine; MIDI I/O; and more, IUSB400 breaks new boundaries for music
performance and production. All you need is a computer with a USB connection, a few microphones and
cables, powered speakers, and your instruments, and you are ready to record in the studio or in front of a
live audience! We encourage you to contact us with questions or comments regarding this product. Sound
Barrier Audio Electronics is committed to constant product improvement, and we value your suggestions
highly. We believe the best way to achieve our goal of constant product improvement is by listening to the
real experts: our valued customers. We appreciate the support you have shown us through the purchase
of this product and are confident that you will enjoy your IUSB400! About This Manual: We suggest that
you use this manual to familiarize yourself with the features, applications, and correct connection
procedures for your IUSB400 before trying to connect it to your computer. This will help you avoid
problems during installation and setup. Throughout this manual you will find Power User Tips that can
quickly make you an IUSB400 expert. In addition to the Power User Tips, you will find an assortment of
audio tutorials at the back of this manual. These tutorials cover everything from microphone placement to
equalizer and compression-setting suggestions.
1.2 Hardware Features
• 24-bit/96 kHz sampling rate
• 2 microphone preamplifiers
• 2 Instrument inputs
• MIDI I/O
• 2x2 USB 2.0 audio interface
• Headphone output
• Analog monitor mixing with playback/input mix control
• Rugged steel chassis
• Compatible with popular audio applications
• Compatible with all major audio applications
• macOS®- and Windows®-compatible
Overview