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Model 81 Stereo Analog
Audio Distribution Amplifier
User Guide
Issue 1, January 2000
This User Guide is applicable for serial numbers:
Model 81 M81-00151 and later
Copyright © 2000 by Studio Technologies, Inc., all rights reserved
5520 West Touhy Avenue
Skokie, Illinois 60077 U.S.A.
Telephone (847) 676-9177
Fax (847) 982-0747
www.studio-tech.com
50204-100, Issue 1
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Table of Contents
Related Manuals for Studio Tools 81
Summary of Contents for Studio Tools 81
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Page 1: User Guide
Audio Distribution Amplifier User Guide Issue 1, January 2000 This User Guide is applicable for serial numbers: Model 81 M81-00151 and later Copyright © 2000 by Studio Technologies, Inc., all rights reserved 5520 West Touhy Avenue Skokie, Illinois 60077 U.S.A. -
Page 3: Table Of Contents
System Overview ............. 7 System Features ............7 Installation ..............9 Configuration ............... 11 Operation ..............11 Troubleshooting ............12 Technical Notes ............13 Specifications............... 14 Block Diagram Model 81 User Guide Issue 1, January 2000 Studio Technologies, Inc. Page 3... - Page 4 This page intentionally left blank. Issue 1, January 2000 Model 81 User Guide Page 4 Studio Technologies, Inc.
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Page 5: Foreword
Foreword I am pleased to present the Model 81 Stereo Analog Audio Distribution Amplifier. As president of Studio Technologies, I take a very personal approach when designing products. Getting older (43 as of this writing) has increased my appreciation of the more subtle things in life—be they a part of nature or the nuances contained in a well-designed piece of electronic equipment. - Page 6 This page intentionally left blank. Issue 1, January 2000 Model 81 User Guide Page 6 Studio Technologies, Inc.
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Page 7: Introduction
Studio Technologies as part of its Studio System Features Tools group of audio support products. One Stereo Input The Model 81 is designed to work in a The differential input circuitry is compat- large variety of applications. Specific ible with balanced or unbalanced signals applications include audio production, having a nominal level range of –12dBV... - Page 8 After checking with person- Audio Performance nel in the field, it became clear that what The Model 81 is the result of exacting is desired in virtually every distribution- circuit design combined with the latest amplifier applications are multiple audio state-of-the-art components.
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Page 9: Installation
The outputs can standard 19-inch (48.3cm) equipment be individually configured for a nominal rack. It is desirable to locate the Model 81 output level of –10dBV or +4dBu, so you to allow easy access to both the front and can connect to all line-level inputs with no the back panels. - Page 10 OUTPUT-4L OUTPUT-8L OUTPUT-4R OUTPUT-8R Notes: 1) Connector type on Model 81 is 25-pin D-subminiature Notes: 1) Connector type on Model 81 is 25-pin D-subminiature female. Installer must provide plug (male). Connector female. Installer must provide plug (male). Connector uses 4-40 threaded inserts for locking with mating plug.
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Page 11: Configuration
If, for example, the setting the switches. output of a console is connected to the input of the Model 81, the console Operation output should be adjusted so that the meters read 0dB or 100%. If the output of the console is a “+4-type,”... -
Page 12: Troubleshooting
If the Model 81 Doesn’t Work At All signals are present on the Model 81’s A source of AC mains power must be input. connected to the Model 81. Depending on the version you have purchased, 100, 120, The LEDs labeled Lo will light whenever or 220-240Vac, 50/60Hz is required. -
Page 13: Technical Notes
Note that a user monitoring, by means of a level meter (e.g., a VU meter), one of the Model 81’s outputs might expect to see a 14dB drop when changing from the +4 to the –10 DIP switch position. In fact, the output level will drop by only 11.78dB. -
Page 14: Specifications
S/N Ratio: 92dB (20Hz-20kHz, ref. +4dBu on input and output) Crosstalk: 86dB (1kHz, ref. +4dBu on input and Specifications and information contained in this output) User Guide subject to change without notice. Issue 1, January 2000 Model 81 User Guide Page 14 Studio Technologies, Inc.
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