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PRELIMINARY USER GUIDE v1.1
© 2017 All the documentation included in this manual is copyrighted by Heritage Audio S.L. All
rights are reserved. No part of this manual may be reproduced, copied, translated or transmitted, in any
form or by any means without the prior written permission of Heritage Audio S.L.
Heritage Audio S.L. reserves the right to make improvements to the products described in this
manual at any time without notice. The information in this manual is intended to be accurate and reliable.
However, Heritage Audio S.L. assumes no responsibility for its use; nor for any infringements of rights of
third parties which may result for its use.
MCM-8
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Summary of Contents for Heritage MCM-8
- Page 1 The information in this manual is intended to be accurate and reliable. However, Heritage Audio S.L. assumes no responsibility for its use; nor for any infringements of rights of third parties which may result for its use.
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Page 2: Front Panel Overview
The MCM-8 is an OST 8 channel 500 Series Enclosure WITH mixer functions. OST is a Heritage Audio proprietary technology which eliminates module’s interaction through the power supply feeding each slot with independent supply stages. The mixer follows a passive voltage summing topology, having the gain loss restored by a classic 1073 type class A output stage. -
Page 3: Back Panel Overview
MCM-8 Iss1 Right part of the unit is dedicated to the mixer’s center section, as follows: VU Meters: Measuring the average level at the master outputs. Master Fader: Attenuates the Mix’s output from unity to minus infinity. The control has a stepped feel for easy recall of settings. Fader all clockwise means unity gain, whilst 12 o’clock means an approximate 20dB of attenuation. -
Page 4: Signal Flow And Block Diagram
MCM-8 Iss1 SIGNAL FLOW AND BLOCK DIAGRAM (Dsubs omitted for clarity) Preliminary User Guide v1.1... - Page 5 ON SLOT TECHNOLOGY ( OST The MCM-8 is also a 500 Series enclosure in a 4U Rack format, able to accommodate up to 8 modules. As the rest of the new Heritage Audio line of 500 Series enclosures, it features “ON SLOT” Technology (OST).
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Page 6: Summing Mixer Description
The MCM-8 mixing section is designed to be used with modules fitted. However it is possible to use it with empty slots by patching input signals into the MCM-8 slot´s outputs. This trick will effectively bypass the slot with full signal integrity and no degradation. -
Page 7: Using The Mixer Bypassing Fitted Modules
MCM-8 Iss1 USING THE MIXER BYPASSING FITTED MODULES Although using the mixer section with empty slots is possible, trying to bypass a fitted module is highly avoidable, as serious signal degradation will happen due to the low output impedance of the module loading the input signal. -
Page 8: Back Panel Conections And Protocols
MCM-8 Iss1 BACK PANEL CONECTIONS AND PROTOCOLS All XLRs are: Pin 1: GND Pin 2: Hot Pin 3: Cold All DSUB 25 multi pin connectors are TASCAM protocol. This same protocol is also used by AVID amongst many others, and is as follows:... -
Page 9: Terminal Function
MCM-8 Iss1 500 SERIES EDGE CONNECTOR PIN OUT TERMINAL FUNCTION CHASSIS GROUND OUTPUT + (+4 LEVEL) NOT USED OUTPUT - COMMON STEREO LINK NOT USED INPUT- (+4 LEVEL) NOT USED INPUT+ (+4 LEVEL) NOT USED +16VDC POWER SUPPLY COMMON -16VDC +48VDC Preliminary User Guide v1.1... -
Page 10: Mixer Section Technical Specifications
MCM-8 Iss1 MIXER SECTION TECHNICAL SPECIFICATIONS Channel Input Impedance: 20 Kohm. Maximum level input: +22dBu Maximum output level: Greater than +26dBu into 600ohm. Frequency response: ±0.5dB 20Hz to 20kHz THD + N: Not more than 0.07% from 50Hz to 10kHz at +20dBu output (80kHz bandwidth) into 600Ω.
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