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INTRODUCTION

CONTENTS

DESCRIPTION

GETTING STARTED

APPLICATIONS

WIRING FOR DB25 CONNECTORS

SPECIFICATIONS

SIGNAL FLOW

TROUBLE SHOOTING

WARRANTY STATEMENT 

REGISTRATION

RECALL SHEETS

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INTRODUCTION 

TABLE OF CONTENTS 

Thank  you  for  choosing  the 

MCM-20.4

  Summing  Mixer.    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 

© 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.

 

MCM-20.4

 

AC POWER

 CORD EU

 & US 

POWER SU

PPLY HA-P

SU02 

Summary of Contents for MCM-20.4

Page 1: ...USER MANUAL 20 CHANNEL SUMMING MIXER MCM 20 4 October 2022 Rev 1 0...

Page 2: ...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 heav...

Page 3: ...plus a balanced insert point and all stereo subgroups are passively summed into the master bus The gain is restored by means of a 73 style Class A transformer coupled mic preamplifier featuring a tota...

Page 4: ...e INS switch activates the insert return input VU Meters Measures the average level at the Master outputs 0 VU 8 dBu Reads post fader and post insert AUX 2 AUX 3ST PAN Depending on the status of the 3...

Page 5: ...TS 9 16 DB25 for Channel Input 9 16 INS RETURNS 9 16 DB25 for Insert Returns 9 16 INPUTS 1 32 DB25 4 for Channel Input 1 8 9 16 17 24 25 36 INS RETURNS 1 32 DB25 4 for Insert Returns 1 8 9 16 17 24 25...

Page 6: ...6 8 CHANNEL SUMMING CHANNEL 1 8 SUBGROUP 1 2 MASTER APPLICATIONS MONITOR SPEAKERS THUNDERBOLT COMPUTER LINE OUTPUTS INPUT 1 8 INPUT 1 2 L R...

Page 7: ...THUNDERBOLT COMPUTER LINE OUTPUTS INPUT 1 8 FROM DAW INPUT 1 2 L R INPUT L R MASTER INPUT COMPRESSOR CHANNEL 1 8 INSERTS EQUALIZER INSERT SENDS 1 8 TO EQ MIX OUTPUT TO DAW L R INSERT RETURNS FROM EQ 1...

Page 8: ...4 SUBGROUPS THUNDERBOLT COMPUTER MONITOR L MONITOR R AUDIO INTERFACE I O 32x32 25 32 MIX OUTPUT L R TO CHANNELS 9 10 TRACKS 1 16 TO CHANNELS 1 16 25 32 17 24 9 16 1 8 CHANNEL 1 16 SUBGROUP 1 4 MASTER...

Page 9: ...INPUT 1 2 L R 8 CHANNELS TO 2 SUBGROUPS FX FX RACK INPUTS OUTPUTS AUX SENDS 1 2 3 STEREO CHANNELS 9 12 FX RETURNS AUX RETURNS 1 2 3 STEREO AUX 2 SEND LEVEL or AUX 3 PAN CONTROL AUX 1 SEND LEVEL or AUX...

Page 10: ...LT COMPUTER LINE OUTPUTS INPUT 1 8 INPUT 1 2 L R 8 CHANNELS TO 4 SUBGROUPS INSERTS FX FX RACK INPUTS OUTPUTS AUX SENDS 1 2 3 STEREO CHANNELS 9 12 FX RETURNS AUX RETURNS 1 2 3 STEREO CHANNEL 1 4 INSERT...

Page 11: ...EL 1 16 SUBGROUP 1 4 MASTER 1 8 9 16 17 24 CHANNEL 1 16 PREAMPS GROUP INSTRUMENTS SIGNALS 1 16 MIX OUTPUT L R TO CHANNELS 17 18 25 32 17 24 9 16 1 8 CHANNEL 1 16 PREAMP OUTPUTS PREAMP OUTPUTS TO DAW I...

Page 12: ...NNEL CHANNEL I P 1 8 1 INPUT 1 2 INPUT 2 3 INPUT 3 4 INPUT 4 5 INPUT 5 6 INPUT 6 7 INPUT 7 8 INPUT 8 It is worth noting that in order to avoid ground loops the DB25 ground connections are lifted on th...

Page 13: ...2 3 INS RETURN 3 4 INS RETURN 4 5 INS RETURN 5 6 INS RETURN 6 7 INS RETURN 7 8 INS RETURN 8 TASCAM DSUB CHANNEL INS RETURNS 1 8 INSERT RETURNS 1 8 INSERT RETURNS 1 SUBGROUP INSERT SEND 1 2 SUBGROUP IN...

Page 14: ...to 600 Noise All faders up all subgroups in measured at the main output 22 Hz to 22 kHz Better than 80 dBu 14 MCM 20 4 POWER SUPPLY The MCM range of summing mixers features a hybrid power supply conce...

Page 15: ...W INPUTS INSERTS TLA AMP ON FADER PAN SUBGROUP O P 1 SUBGROUP O P 2 1 2 3 4 5 6 7 8 CHANNEL 1 8 SECTION INPUTS INSERTS TLA AMP ON FADER PAN SUBGROUP O P 3 SUBGROUP O P 4 1 2 3 4 5 6 7 8 CHANNEL 9 16 S...

Page 16: ...CTION DETAILED AUX SEND SECTION SAME ALL CHANNELS SUBGROUP O P 1 SUBGROUP O P 3 AUX INPUT 1 AUX INPUT 3 SUBGROUP O P 2 SUBGROUP O P 4 AUX INPUT 2 AUX INPUT 4 MASTER OUT L MASTER OUT R MONITOR OUT L MO...

Page 17: ...to both sides There is no signal at all appearing at the Stereo Master Double check your cables and connections I d like to get a Direct Out from each channel Is it possible Yes of course Just tap the...

Page 18: ...chase 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 ba...

Page 19: ...3ST SEND 3ST SEND 3ST SEND 3ST SEND 3ST SEND 3ST SEND 3ST SEND 3ST SEND 3ST SEND 3ST SEND 3ST SEND 3ST SEND Session Title Track Connected Equipment Date Instrument Notes Switch ON Switch OFF SUB 1 2...

Page 20: ...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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