The Moog Modular System 35 is a well-refined 5-oscillator instrument comprised of 22 handcrafted analog modules and housed in a hand-finished solid walnut cabinet. This elegant studio solution has been faithfully recreated to be the centerpiece of inspiration and sound in the modern composition studio and delivers all of the sonic depth and dimension found only in a vintage Moog modular synthesizer. Also available configured with an additional 960 Sequencer Complement B.
Faithfully Recreating the System 35
Over the course of 3 years, Moog Music set out to research and build a faithful recreation of the revered Moog modular System 35 analog synthesizer. Using all original documentation as well as circuit board and art files for every module, Moog Engineers have painstakingly recreated this incredibly powerful and elegant analog instrument.
Each System 35 is hand-built to its original Moog 1974 factory specifications and is a true recreation of the original. Individual modules are brought to life just as the originals were, by hand-stuffing and hand-soldering components to circuit boards, and using traditional wiring methods. Each module is then finished with a photo-etched aluminum panel, and placed in its new modular instrument.
This limited reissue of the Moog modular System 35 is built to order, and is available in highly limited quantities. Only 35 units will be made worldwide.
System 35 Modules
3x 902 Voltage Controlled Amplifiers
1x 904A Voltage Controlled Low Pass Filter
1x 904B Voltage Controlled High Pass Filter
1x 907A Fixed Filter Bank
3x 911 Envelope Generators
1x 921 Voltage Controlled Oscillator
2x 921A Oscillator drivers
4x 921B Oscillators
1x 923 Random Noise/Filter
2x CP3A Console Panels
1x CP4A Console Panel
1x CP8A Console Panel
1x CP35 Console Panel
1x 180 Watt 120 VAC or 230 VAC Switch Selectable Power Supply
Included Patch Cabling
10x - 1' 1/4" TS cables
8x - 2' 1/4" TS cables
8x - 3' 1/4" TS cables
4x - 4' 1/4" TS cables
2x - 5' 1/4" TS cables
2x - 1' S-Trigger cables
2x - 3' S-Trigger cable
1x - 'Y-cable' S-Trigger
Weight: 100 lbs
Dimensions: 48 1⁄2" wide x 15 1⁄2" high x 14" deep
Modules And Their Original "Functional Descriptions"
902 Voltage Controlled Amplifier: The 902 voltage Controlled Amplifier is a differential input and output circuit which gives an overall voltage gain of 2 {6dB} when the manual control potentiometer is at maximum {6}, or when a control voltage of 6 volts is applied to the control input. Maximum sum of control voltage {fixed control voltage and input jacks} is approximately 7.5 control volts, producing +4.7dB or gain of 3. Two modes of gain response are available: linear
and exponential.
904A Voltage Controlled Low Pass Filter: The 904A Low Pass Filter attenuates frequencies above the fixed control voltage cutoff point at a rate of 24dB per octave. The cutoff point {cutoff frequency} is voltage controlled through the control input jacks. The sum of the applied control voltages doubles the frequency of the cutoff point for each one-volt increase {volt per octave standardization}. The regeneration potentiometer {variable Q} varies the amount of internal
feedback, creating a resonant peak at the cutoff frequency. This resonant peak will break into oscillation at clockwise settings of the
regeneration pot, creating a voltage controlled sine wave generator.
The fixed control voltage pot covers a 12-volt {octave} range. The
overall range of the FCV pot is determined by the Frequency Range
switch, which moves the frequency cutoff range in two-octave steps.
The basic cutoff frequency of the Low Pass Filter is determined by the
combination of fixed control voltage and frequency range in addition to
the control input signals. An increase in regeneration narrows and
increases the strength of the cutoff frequency peak, while decreasing
the amplitude of the lower frequencies. 904B Voltage Controlled High
Pass Filter: The 904B Voltage Controlled High Pass Filter attenuates
input signal frequencies below its nominal cutoff frequency setting.
The attenuation below FCV cutoff setting is 24dB/oct. As the
fundamental is generally the loudest frequency component of a complex
tone, deletion of the lowest frequency range can radically alter the
timbre. The FCV cutoff point is raised or lowered in octave per volt
control inputs. The Frequency Range switch sets the overall range of
frequencies covered by the Fixed Control Voltage potentiometer. The Low
range encompasses 4hz to 20kHz, while the High range shifts 1 1/2
octaves up to 10Hz through 50kHz.
907A Fixed Filter Bank: The 907A Fixed Filter Bank is a
non-voltage controlled modifier, which emphasizes or reduces the gain
of the center frequency bands indicated on each of the eight center
pots, in addition to the cutoff points set by low pass and high pass
filters at either frequency extreme. A total of 10 overlapping LC
networks are included.911 Envelope Generators: At the introduction of a
switch-to-ground {S-trigger} trigger signal from an external source,
the 911 Envelope Generator produces a single voltage contour whose
time/voltage variation is determined by potentiometers T1, T2, T3 and a
time constant sustaining level pot {Esus}. Closure of the input trigger
switch directs the voltage contour to T3 {final decay} regardless of
what stage { T1, T2 or E} was in current operation. The Envelope
Generator requires an S-trigger to operate. External sources must be
converted to the S-trigger format via the 961 Interface.
921 Voltage Controlled Oscillator: The 921 Voltage Controlled
Oscillator is a variable waveform generator, which produces frequencies
ranging from .01Hz to 40kHz. Four waveforms are available: Sine,
Triangular, Sawtooth, and Rectangular {with variable duty cycle}. Both
fixed and variable levels can be obtained from front panel output
jacks. Nominal frequency is set manually by the scale, coarse range,
frequency and {octave} range controls found at the top of the module.
Voltage controlled rectangular width is set by the knob in the upper
center {left}, with accompanying voltage input jacks. Clamping point
{waveform reset control} may be set with the lower left knob and
accompanying trigger inputs to the left. Multiple frequency control
inputs can be plugged into this module in parallel. All waveform
outputs can be used concurrently if desired.
All manual controls on this module can be moved or switched during
operation. This module functions as both an audio or control voltage
generator.
921A Oscillator Drivers: The 921A Oscillator Driver is a
control voltage processor, which drives associated 921B oscillators
through internally wired connections {via edge connectors}. Two
voltages are generated: one for frequency control and one for
rectangular wave duty cycle. Control inputs to this module change the
frequency of its associated oscillators in volt/octave increments.
Manual adjustment to the Frequency and Width Of Rectangular Wave pots
changes the nominal frequency and duty cycle of all connected 921B's in
parallel. Two ranges are provided on the Frequency potentiometer:
semitone {two octaves compass} and octave {12 octaves compass} These
ranges are selected by the white switch below the Frequency
potentiometer. Control inputs for frequency and rectangular width are
summing.
921B Oscillators: The 921B Oscillator generates frequencies from
1Hz to 40kHz minimum. They are wired in groups to a common 921A
Oscillator Driver, which provides both exponential frequency control
and rectangular width voltage control. Like the 921 Oscillator, this is
one of the building blocks of analog synthesis. This oscillator
generates both sub-audio and audio frequencies for control and audio
signal use. The Frequency pot at the top of the module has a two-octave
range for fine-tuning, while the Range switch shifts the frequency of
the oscillator in octaves, up or down. Number indications on the Range
switch correspond to traditional organ pipe range notations. Fixed
level outputs for Sine, Triangle, Sawtooth and Rectangular waveforms
are found at the right of the modules. DC Modulate is a linear
frequency control input {does not conform to 1 volt/octave control
voltage format}. AC Modulate input is a capacitor-coupled circuit like
the DC Modulate input, however, blocking constant DC voltages.
921B Oscillators may be phase locked together via the Synch input jack
and the associated three position Synch Switch. Phase locking
capability is generally limited to the first six harmonics of the input
signal. A sawtooth waveform is recommended for best synchronization
results.
923 Random Noise/Filter: The White and Pink noise outputs of the
923 Random Noise/Filter module produces continuous bursts of random
frequencies and waveshape throughout the audio spectrum. Pink noise
displays equal amplitude/energy per octave. A resultant lower
frequency concentration for Pink Noise marks the difference between the
two outputs, with white noise appearing in even intensity throughout
the audio spectrum. Parallel outputs are provided for both noise
sources. The two manual sweep filters, Low Pass and High Pass, are
single pole {RC} circuits with a frequency cutoff slope of 6dB per
octave.
CP3A Console Panels: The CP3A module has four varied functions.
The primary circuit is a 4x1 mixer with positive and negative outputs
and a maximum gain of 2x. This mixer can combine both AC and/or DC
voltages. The second series of functions are four signal routing
switches, which connect the incoming control voltages from keyboard,
ribbon or other controller units to the frequency control input of
associated oscillator drivers found directly above the switching panel.
The fourth input switch has both an external input jack and attenuator
{found directly below}. This input jack is connected to the Oscillator
Driver when the associated switch is on and the attenuator set above
zero. At "10" a signal introduced here will be equal to one which is
introduced directly into the frequency control inputs found on the
Oscillator Driver itself. The two final elements found on the CP3A are
a multiple {signal splitting - one input becomes three} and trunk line
jacks, which carry a signal to the rear of the synthesizer.
CP4A Console Panel: Specifications to be provided
CP8A Console Panel: Specifications to be provided
CP35 Console Panel: Specifications to be provided
