CMS 1000 SERIES ARP 2500 Inspired Eurorack System

This one was spotted and sent in via Soviet Space Child.

Note CMS fully restored this vintage ARP 2500 posted back in 2007. Phil Cirocco of CMS / Discrete Synthesizers is an ARP specialist. See the CMS label for additional posts. via Discrete Synthesizers aka CMS

Left: "The photo shows a suggested arrangement of modules for a 12 module CMS Euro-Rack system. This is Phil Cirocco's personal machine.

UPDATED - 1/20/2023

1000 SERIES MODULE NEWS"

1036 DUAL SAMPLE AND HOLD - IN STOCK

1051 MIX-SEQUENCER EXPANDER - IN STOCK

ALL 1004 MODULES NOW FEATURE A REAR "OP PORT" CONNECTOR FOR EASY CONNECTION TO THE 1004OP OUTPUT EXPANDER - NO MORE SOLDERING

COMING SOON:

1017 SEQUENCER

CMS has unrivaled experience in servicing ARP 2500 synthesizers for over 35 years. We personally hand assemble all our modules here in the USA with top shelf components and top quality hardware. We design these modules using our extensive knowledge and experience servicing original ARP 2500s and 2600s.

THE 1004T PEARLMAN OSCILLATOR IS AN EXACT REPRODUCTION OF THE UNIQUE AND REVOLUTIONARY TEMPERATURE COMPENSATED VCO CIRCUIT COMBINED WITH ANOTHER CIRCUIT UNIQUE TO THE 2500 - THE "T" WAVEFORM MIXER - BOTH DESIGNED BY ALAN R. PEARLMAN.

THE 1004OP OSCILLATOR OUTPUT EXPANDER KIT PROVIDES 5 SIMULTANEOUS VCO OUTPUTS AS WELL AS AN ADDITIONAL T MIXER OUTPUT. IT COMES WITH A DETACHABLE WIRING HARNESS. CURRENT ISSUE 1004 MODULES NOW FEATURE A NEW REAR CONNECTOR - NO SOLDERING

THE 1006 PEARLMAN FILT-AMP IS THE CORE OF THE 2500 SYSTEM. IT IS A TRIPLE MODULE: A HIGH QUALITY 4 INPUT AUDIO MIXER. A GREAT SOUNDING 4 POLE DISCRETE TRANSISTOR LADDER FILTER. THE CLASSIC ARP CURRENT MIRROR VCA.

THE 1016 DUAL NOISE AND RANDOM VOLTAGE GENERATOR MODULE PRODUCES HIGH QUALITY, TRUE RANDOM NOISE SIGNALS AS WELL AS THE DISTINCTIVE SLOW RANDOM SIGNALS. THESE ARE VERY USEFUL AS MODULATION SOURCES.

THE CMS 1033 USES SPECIAL HIGH GAIN TRANSISTORS TO ATTAIN SOME VERY FAST RESPONSE TIMES. THE CMS 1033 USES THE EXACT DISCRETE CIRCUITRY THAT THE ORIGINAL 1033 USED, MADE TO CMS'S ULTRA HIGH STANDARDS.

THE 1036 IS A DUAL MODULE THAT UTILIZES 6 SEPARATE CIRCUITS IN A COMPACT AND FUNCTIONAL FORMAT. THERE ARE: 2 INDEPENDENT VOLTAGE CONTROLLED LOW FRQUENCY PULSE OSCILLATORS WITH EXTERNAL CONTROL. TWO HIGH PRECISION SAMPLE AND HOLD CIRCUITS AND TWO INDEPENDENT WHITE NOISE GENERATORS.

THE CMS 1047 IS A CLONE OF THE FAMOUS ARP 1047 MULTIMODE FILTER AND IS A KEY INGREDIENT IN OBTAINING THE ARP 2500 SOUND. THE CMS 1047 IS NOW AVAILABLE FOR PURCHASE. CLICK HERE FOR MORE INFORMATION.

THE CMS 1050 MODULE IS A FAITHFUL REPRODUCTION OF THE FAMOUS ARP 1050 MIX-SEQUENCER. BOTH MODULES UTILIZE THE EXACT DISCRETE AUDIO SWITCHING CIRCUITRY THAT THE ORIGINAL ARP 1050 USED. DC VOLTAGE IS NORMALIZED TO ALL INPUTS FOR STANDARD VOLTAGE SEQUENCING.

THE CMS 1051 EXPANDS THE 1050 MIX SEQUENCER TO THE FULL 8 CHANNELS. THIS MODULE CAN ALSO FUNCTION INDEPEDENTLY AS A HIGH QUALITY 4 CHANNEL MIXER. THIS MODULE IS DESIGNED FOR LARGER SYSTEMS. 3 AUX BINARY GATE OUTS ARE PROVIDED FOR RHYTHMIC TRIGGERING.

THE CMS 1055 IS AN UPDATED AND MUCH MORE USEFUL VERSION OF THE ARP 1005 MODULE. IT USES THE EXACT CIRCUITRY THAT THE ARP 1005 USES WITH BASICALLY A REVERSED SIGNAL PATH ORDER, PLUS AN ADDITIONAL VCA FOR PANNING AND VOLTAGE CONTROLLED MIXING EFFECTS, JUST TO NAME A FEW.

THE CMS 1066 IS AN IMPROVED VERSION OF THE FILTER SECTION FROM THE ARP 1006 FILT-AMP MODULE. IT IS ARP's VERSION OF THE TRANSISTOR LADDER.

THE CMS 1067 IS A UNIVERSAL MODULE. IT IS A FAITHFUL REPRODUCTION OF THE 2500 VCA CIRCUIT USED IN THE ARP 1006 AND 1005 MODULES. IT IS ALSO AN IMPROVED VERSION OF THE VCA USED IN THE ARP 2600.

THE CMS 1070 IS A PRECISION LOW NOISE AUDIO MIXER. THE CMS 1000 SERIES MODULES SOUND GREAT WHEN USING MANY VCOS MIXED TOGETHER AND DETUNED, CAUSING MULTIPLE PHASE INTERACTIONS. 4 TO 6 T- MIXER VCOS REALLY SOUND INTERESTING GOING THROUGH THE 1047 AND THE 1006 IN SERIES.