CMS/DISCRETE SYNTHESIZERS 1066 module is a faithful reproduction of the filter section from the world famous ARP 1006 filt-amp module. The 1006 module was the basic building block for the ARP 2500 synthesizer. CMS has made this critical component used in the ARP 2500 available again in a high quality version of the euro-rack format.

CMS has extensive knowledge and experience building, testing and repairing many different incarnations of the Moog transistor ladder filter. We have taken this expertise and applied it to the euro-rack world.

The 1066 filter section is ARP's version of the transistor ladder filter. It differs from the 4012 ladder filter used in early 2600s because it uses a purely bipolar transistor signal path. It has a warmer sound and a different frequency response than the ARP 2600 filter. The resonance on this filter sounds very different than the 2600 filter also.

Using the 1066 low-pass response in series with the 1047 high-pass function enables the user to accurately reproduce many of the classic ARP 2500 sounds. You can now realize this sound in your studio with the 1047 and 1066 from CMS. The 1067 VCA is also recommended.

If you want to reproduce the sound of the ARP 2500 exactly, check out our other 1000 series modules available from CMS. They are all based on the ARP 2500 system.

FEATURES:

This unique and complex circuit utilizes an all-bipolar matched transistor signal path to produce it's distinctive and highly resonant sound.

High quality construction and top shelf components, Switchcraft jacks, Alps attenuators.

CMS engineering used in many professional recording studios across the USA and Europe.

Main frequency control pot features an extra large geometry "virtual infinite resolution" potentiometer for accurate control of frequency.

3 control voltage inputs. 1 fixed at 1v per octave and 3more with attenuators.

Easy to understand flowchart front panel graphics facilitate operation.

The CMS Module 1066 is a functional circuit package designed for use in Euro-Rack electronic music synthesizers. It is the filter section from the original ARP 1006 Filt-Amp module. It is Alan Pearlman's take on the Moog transistor ladder filter. This unique and complex circuit utilizes several matched discrete differential pairs and hand matched capacitors to produce it's distinctive and highly resonant sound.

The unit consists of a highly resonant filter with voltage controlled frequency and provides high pass and low-pass, outputs. The filter is capable of providing a wide variety of formant shaping and tonal modulation.

The cutoff frequency of the high pass and low pass output is referred to as "Fc". Fc may be set by the frequency knob over the range of 16 Hz to 16 KHz. Control signals applied to any Fc input will change the cutoff frequency from the knob setting by 1 octave per volt when the knob above the control input is at maximum. Control signals from the individual inputs are summed with the Fc knob controls, and may be positive, negative, or audio.

With the RESONANCE (Q) knob at minimum:

The high pass output has unity gain from 16 Hz to 20 KHz and attenuates 24db per octave below Fc.

The low pass output has unity gain from 16 Hz to to 20 KHz and attenuates 24db per octave above Fc.

As the RESONANCE (Q) knob is turned up, a resonant peak occurs at Fc

The dedicated v/oct input is calibrated to a 1V per octave scale.

The new improved front panel is now made of a special material that has the image impregnated into the aluminum surface. It will not fade over time or wear off from finger action.