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INTRODUCTION

CONTENTS

DESCRIPTION

GETTING STARTED

APPLICATIONS

SPECIFICATIONS

SIGNAL FLOW

TROUBLE SHOOTING

WARRANTY STATEMENT 

REGISTRATION

RECALL SHEETS

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TABLE OF CONTENTS 

Thank you for choosing the

 73 JR II

.  Heritage Audio is dedicated to bringing you ´the sound of yesterday for tomorrow´.  

We  specialize  in  capturing  that  unique,  enticing  sound  that  everybody  has  fallen  in  love  with.    For  years  engineers, 

producers and musicians have been yearning for that classic vibe.   Usually the only option is to search for old, used 

original  equipment  that  is  almost  always  in  a  questionable  state  of  operation.   This  brings  with  it  a  whole  lot  of  other 

issues, making the experience less than desirable.  Not to mention the very high prices asked for this equipment, which 

makes them virtually unobtainable for the great majority.  Now it´s possible to obtain that same sound with a brand new 

piece that will give you all the problem-free, heavy-duty use you´ll need for years of music making history.

Peter Rodriguez 

CEO

Heritage Audio - Madrid, Spain 

INTRODUCTION 

© 2022 Heritage Audio S.L. is the sole owner of the copyright of all information and drawings contained in this manual which are not to be copied or 
reproduced by any means or disclosed in part or whole to any third party without written permission. 

Heritage Audio reserves the right to alter specifications without notice. The information in this manual has been carefully checked and is believed to 
be accurate at the time of publication. However, no responsibility is taken by us for inaccuracies, errors or omissions nor any liability assumed for any 
loss or damage resulting either directly or indirectly from use of the information contained within it.

 

73 JR II 

Summary of Contents for 73 JR II

Page 1: ...USER MANUAL MONO MIC LINE PREAMP D I 500 Series Module 73 JR II August 2022 Rev 1 0...

Page 2: ...quipment which makes them virtually unobtainable for the great majority Now it s possible to obtain that same sound with a brand new piece that will give you all the problem free heavy duty use you ll...

Page 3: ...I Eliminate one gain stage and run only up to 70 dB of gain A real deal 73 mic pre must have 3 gain stages for a total of 80dB of gain Taking the first gain stage out and maxing out the other 2 allows...

Page 4: ...A OUTPUT ATTENUATOR Attenuates from 0 to Infinity FRONT 1 2 3 4 5 INPUT GAIN SWITCH 5dB Steps From 30 to 80 MIC INPUT IMPEDANCE 1200 or 300 when pressed LINE Switches from MIC D I to Line PHASE Flips...

Page 5: ...ONDENSER MIC USB COMPUTER LINE INPUT AUDIO INTERFACE D I USB COMPUTER LINE INPUT AUDIO INTERFACE OUTPUT 1 73 JR II SLOT 1 D I INPUT ACTIVATE LINE D I SWITCH ACTIVATE 48V FOR CONDENSER MIC OUTPUT 1 INP...

Page 6: ...OR CONDENSER MIC USB COMPUTER LINE INPUT AUDIO INTERFACE OUTPUT 2 OUTPUT 1 73 JR II SLOT 1 INPUT 1 INPUT 1 73 JR II SLOT 1 LINE MONO OUTPUT KEYBOARD CONDENSER MIC 6 Another popular use for the LINE mo...

Page 7: ...to drive a load of 600 D I input impedance Greater than 2 M unbalanced Maximum output Greater than 26 dBu into 600 internally terminated THD Less than 0 025 at 1 kHz Less than 0 05 at 100 Hz Frequency...

Page 8: ...t by 20 dB ahead of the input transformer Condenser microphones don t seem to work with 73 JR II Make sure the red 48 V button is pressed in to activate the phantom power sent to the microphone There...

Page 9: ...date The warranty excludes problems due to normal wear abuse shipping damage or failure to use the product in accordance with the specifications Heritage Audio shall not be liable for damages based up...

Page 10: ...RECALL SHEETS 10 Session Title Track Connected Equipment Date Instrument Notes Switch ON Switch OFF Session Title Track Connected Equipment Date Instrument Notes Switch ON Switch OFF...

Page 11: ...www heritageaudio com HERITAGE AUDIO C Alfonso G mez 38 3C 28037 Madrid Spain Tel 34 917 266 189 info heritageaudio com...

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