Heritage Audio RAM System 500 User manual

USER MANUAL
8-SLOT 500 SERIES CHASSIS
With Integrated
10-Channel Summing Mixer
MCM-8 II
August/2022)Rev.)1.0.)

2
INTRODUCTION
CONTENTS
DESCRIPTION
GETTING STARTED
APPLICATIONS!
WIRING FOR DB25 CONNECTORS
SPECIFICATIONS
TROUBLE SHOOTING
WARRANTY STATEMENT
REGISTRATION!
RECALL SHEETS
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2
3
4
5
8
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10
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INTRODUCTION
TABLE OF CONTENTS
Thank you for choosing the MCM-8 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
© 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-8 II
AC POWER CORD EU & US
POWER SUPPLY HA-PSU02
RACK SCREWS
WIRING FOR DB25 CONNECTORS

DESCRIPTION
3
In 2015, Heritage Audio set a new standard in 500 Series enclosures with the addition of the OST technology. Then, we
introduced the MCM8, a true transformer-based voltage summing mixer for 500 Series modules. Hundreds of units
later, we have taken all our customers´ feedback and included it in the new and improved version, the MCM-8 II.
The main differences between this version and its predecessor are: Additional 500 series button per channel, allowing
you to bypass the 500 series module when mixing if desired. This also allows for quick comparisons between
processed/unprocessed signals. As well as making using the mixer with empty slots much easier by simply unpressing
the 500 button.
Significantly lower noise: A highly innovative, new quasi-balanced voltage summing topology sets the noise floor of the
new MCM-8 II near the theoretical minimum. No more hiss in your mixes!
Standing for Music Compact Mixer 8, the MCM-8 II is an 8 slot 500 Series enclosure with 10 channel mixing capabilities
and it´s the Top of the Line of the new Heritage Audio “ON SLOT” Technology (OTS) 500 Series enclosures.
“ON SLOT TECHNOLOGY”!
Takes advantage of latest generation of power electronics to handle power supply on a “per slot” basis. Each slot has its
own power supply linear regulation stages; therefore modules are isolated from the rest. They just share the metal
enclosure.!
With literally hundreds of brands making 500 series modules, we at Heritage Audio think this is the professional way of
handling this reliably, eliminating issues often associated with sharing power between different modules of different
brands and manufacturers.!
Each slot features test LEDs for checking correct power operation (red for +16 V, green for -16 V), located aside of the
slot connector.!
Thanks to the use of OST, the power capability of the MCM-8 II is 400 mA per rail per slot maximum, with an overall of
1.4 A (1.6 A non continuous) per rail, whichever is reached first.!
Phantom power available is 140 mA total.!
The RAF Blue Gray enclosure is made out of heavy gauge steel with an aluminum front panel.
There are Pan and Fader controls per slot on dual concentric potentiometers. Pan pots are center detent for precise
center positioning. Features include an ON switch to assign each channel to the Mix Bus for Stereo summing.
The Mix Bus follows a passive, voltage summing topology, similar to that found in the 80 Series consoles of the 70s. The
gain loss is restored by the same Class A, 2n3055 driven, Carnhill transformer based output stage used in the Heritage
Audio DMA 73.
An additional Stereo Input (AUX IN L & R) is provided on the back of the unit, allowing several MCM-8 II units to be
daisy chained, or signals not needing further 500 series processing to be mixed together.
The central section has analog VU meters and a Stereo Master fader.
Connections are made by means of both gold plated XLRs and DB25 with the Tascam standard protocol.

GETTING STARTED
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FRONT
1
2
3
4
5
ON SLOT TECHNOLOGY
Individual power per slot
SLOTS (8)
On Gold Plated Edge
Connectors
VOLTAGE LEDs
Verify that the correct voltage is
arriving at each slot (±16 V)"
CHANNEL PAN
Positions the signal from Left to
Right, center detented
CHANNEL FADER
From Infinity to Unity
REAR
1
2
3
4
MAIN OUTPUTS L&R
On Gold Plated XLRs
AUX INPUTS L&R
On Gold Plated XLRs
OUTPUTS 1-8
25 PIN D-SUB(DB25) CONNECTOR
INPUTS 1-8
25 PIN D-SUB(DB25) CONNECTOR
6
7
8
9
10
CHANNEL ON/OFF
´On´ sends Signal to Stereo
summing bus.
500 BUTTON
Routes the Signal Through the
500 Series Module
MASTER VU METERS
Calibrated at 0VU= +8 dBu
MASTER FADER
From Infinity to Unity
GLOBAL POWERING
INDICATORS
Confirms the Correct Voltage is
arriving from the External
Power Supply
5
6
7
OUTPUTS 1-8
On Gold Plated XLRs
INPUTS 1-8
On Gold Plated XLRs
EXTERNAL POWER INPUT HA-PSU02
On Gold Plated XLR5
4
5
6
7
3
9
8
1
2
10
7
3
4
2
1
6
5

RECORDING
APPLICATIONS
MONITOR
SPEAKERS
THUNDERBOLT
COMPUTER
KICK
SNARE
HI HAT
TOM 1
OH - L
SNARE
TOM 2
OH - R
1 - MIC INPUT
2 - MIC INPUT
3 - MIC INPUT
4 - MIC INPUT
5 - MIC INPUT
6 - MIC INPUT
7 - MIC INPUT
8 - MIC INPUT
OUTPUTS 1-8
1
2
3
5
4
8
6
7
INPUTS 1-8
LINE INPUTS
AUDIO INTERFACE
5
73 JR II
Modules not included
Make sure the ´500´ button is
pressed to activate the 500
Series module. (73 JR II)

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SUMMING
USB - COMPUTER
LINE INPUTS - AUDIO INTERFACE
SUMMED OUTPUTS L&R
MCM-8 II INPUTS 1-8
MULTITRACK OUTPUTS 1-8
Make sure the ´On´ button is
pressed to send the signal on to
the Stereo Bus for summing.

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SUMMING
+
PROCESSING
USB - COMPUTER
LINE INPUTS - AUDIO INTERFACE
SUMMED OUTPUTS L&R
MULTITRACK OUTPUTS 1-8
Make sure the ´On´ button is
pressed to send the signal on to
the Stereo Bus for summing.
MCM-8 II
INPUTS 1-8 (DB25)
Make sure the ´500´ button is
pressed to activate the 500
Series module. (73 JR II)
73 EQ JR
Modules not included

1
INPUT # 1
2
INPUT # 2
3
INPUT # 3
4
INPUT # 4
5
INPUT # 5
6
INPUT # 6
7
INPUT # 7
8
INPUT # 8
All DB25 multi pin connectors are TASCAM protocol. This same protocol is also used by AVID amongst many others, and
is a follows:
The list of the DB25 connectors used and their corresponding channels are as follows:
TASCAM DSUB
CHANNEL #
CHANNEL I/P
1-8
1
OUTPUT # 1
2
OUTPUT # 2
3
OUTPUT # 3
4
OUTPUT # 4
5
OUTPUT # 5
6
OUTPUT # 6
7
OUTPUT # 7
8
OUTPUT # 8
It is worth noting that, in order to avoid ground loops, the DB25 ground connections are lifted on the Súper 8 side,
leaving the ground paths of your DB25 snakes only acting as shields and preventing any current returns.
TASCAM DSUB
CHANNEL #
CHANNEL O/P
1-8
Pin-out for TASCAM DB25 8 Channel Balanced Connector
CHANNEL INPUTS 1-8:
CHANNEL OUTPUTS 1-8:
H = HOT
C = COLD
G = GROUND
WIRING FOR DB25 CONNECTORS
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SPECIFICATIONS
• On Slot Technology.
•Maximum audio rails current: 1,8 A per rail, or 400 mA per rail per slot, whatever is reached first.
•Maximum phantom power current: 140 mA.
•Operating voltage: Universal 100-240 V AC.
•Dimensions (W x H x L): 482 mm x 220 mm (5 Rack units) x 185 mm.
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*Modules 73 EQ JR not included
ENCLOSURE SECTION
•Channel Input Impedance: 20 kΩ.
•Maximum input level: Over +27 dBu.
•Maximum output level: Greater than +26 dBu into 600 Ω.
•Frequency response: ±0,5 dB 20 Hz to 20 kHz.
•THD + N: Not more than 0,07 % from 50 Hz to 10 kHz at +20 dBu output (80 kHz bandwidth) into 600 Ω.
•Self-noise: -90 dBu.
MIXER SECTION

TROUBLE SHOOTING
PROBLEMS
SOLUTIONS
There doesn´t seem to be any power feeding the MCM-8
II.
Make sure the HA-PSU02 has been connected.
No audio seems to be getting to the modules.
Double check that you have correctly connected the
Inputs and Outputs for the slot.
There is still no signal getting to the modules.
Make sure that you have pressed the ´500´ button to
activate the 500 Series module.
There is no signal present at the L & R XLR Outputs.
Make sure you have pressed the ´ON´ button to send the
signal to the summing bus, the MAIN Stereo Outputs
(L&R).
8 inputs is not enough, I need more to sum everything.
You have the option to use the pair of AUX IN L & R Inputs
to connect another MCM-8 II giving you a total of 16
inputs with processing by 500 Series modules. All
summed together into a Stereo Mix (OUTPUT L & R).
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* For any further doubts or questions please get in contact with us at: [email protected]!

LIMITED 2 YEAR WARRANTY
Heritage Audio MCM-8 II is warranted by Heritage Audio SL to be free from defects in materials and workmanship for
the period of 2 years to the original purchaser. In the event of such defects, the product will be repaired without charge
or, at our option, replaced with a new one if delivered to Heritage Audio prepaid, together with a copy of the sales slip or
other proof of purchase 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 upon inconvenience, loss of use of the product, loss of time,
interrupted operation or commercial loss or any other damages, whether incidental, consequential or otherwise.
This warranty is not transferable.
Heritage Audio and the Heritage Audio “H” logos are registered Trademarks owned and/or licensed by Heritage Audio.
REGISTRATION
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Please visit our website:
WARRANTY STATEMENT
*Modules 73 JR II
https://heritageaudio.com/registration/

RECALL SHEETS
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Session / Title: Track: Connected Equipment: !
Date: Instrument: Notes:
Switch ON
Switch OFF
Session / Title: Track: Connected Equipment: !
Date: Instrument: Notes:
Switch ON
Switch OFF

www.heritageaudio.com
HERITAGE AUDIO. C/ Alfonso Gómez, 38, 3C. 28037 Madrid – Spain. Tel: [phone]
[email protected]