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.
