SM Pro Audio
Operational Manual
DI-1
Version 1.0 November 2005
FOREWORD
Dear pro audio enthusiast, thank you and congratulations for choosing the DI-1 'Active
Direct Injection Box' from SM Pro Audio.
As with all SM Pro Audio products, in developing the DI-1 'Direct Injection Box' we paid
special attention to achieving optimal performance and functionality whilst maintaining an
affordable pricing solution. We know you will enjoy continuing reliability and performance
from your DI-1.
Regards,
SM Pro Audio
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TABLE OF CONTENTS
1. Introduction
2.1 Battery installation
2.2 Battery on/off switch
3.1 Battery led indicator
3.2 Phantom Power led indicator
4.1 Input connections
4.2 Output connections
5.1 Attenuation control
6. Ground
6.1 Ground lift switch
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1. INTRODUCTION
DI box's are an essential tool that ensure audio signals reach their destination free of
unwanted noise, and in a balanced format. The DI-1 provides a range of features such as
level and impedance matching, phantom power indication, signal pass through, and
ground lift functionality.
The DI-1's versatility makes it suitable for a wide range of applications. You can connect
the output from electric guitars, bass amplifiers, keyboards, or just about any other audio
signal output directly to a console mixer, without the use of a microphone.
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