Moog Music System 55 with Sequencer Complement B and Two 953 Keyboards (Used)

The Moog Music System 55 modular synthesizer is a highly sophisticated and dynamic analog instrument comprised of 36 handcrafted modules and housed in 2 hand-finished solid walnut cabinets. This instrument provides limitless sonic potential and inspiration, while delivering the depth and dimension of sound found only in a vintage Moog modular synthesizer. The System 55 comes equipped with the coveted 960 Sequential Controller for incorporating extensive rhythmic complexity into the creative process.

FAITHFULLY RECREATING THE SYSTEM 55

Three years of research and design has culminated in Moog Music recommencing the manufacturing of a limited number of Moog System 55 modular synthesizers. Using all of the original documentation, as well as the original circuit board and art files, Moog engineers have hand-built true recreations of the original instruments based on their 1973 factory specifications. Each individual module is hand-stuffed and the components are hand-soldered to circuit boards using traditional wiring methods. Each module is then finished with a photo-etched aluminum panel, and placed in its new modular instrument.

SEQUENCER COMPLEMENT B PORTABLE EXPANSION CABINET

The Moog Sequencer Complement B portable expansion cabinet provides rhythmic accompaniment and extended synthesis capabilities for increased inspiration and sonic potential. All Sequencer Complement B portable expansion cabinets are hand-built to their original 1974 Moog factory specifications and are true recreations of the originals. 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 cabinet. Includes two 960 Sequential Controllers, 961 Interface, and two 962 Sequential Switches.

953 DUOPHONIC 61-NOTE KEYBOARD

The Moog 953 is a 61 key duophonic keyboard designed for use with the Moog modular System 55, 35 and Model 15 analog synthesizers, as well as for use with vintage Moog modular synthesizers. It features dedicated controls for Range 1 and Range 2 and for Scale 1 and Scale 2. On/OFF switches for Glide 1 and Glide 2 and portamento controls for Range 1 and Range 2. Selectable Glide Type (Linear Constant Rate or Exponential). Removable barrel connector for easy storage and replacement.

SYSTEM 55 MODULES

• 5x 902 Voltage Controlled Amplifier: The 902 voltage Controlled Amplifier is a differential input and output circuit which gives an overall voltage gain of 2 (6 dB) when the manual control potentiometer is at maximum (6), or when a control voltage of 6 volts is applied to the control input.
• 1x 903A Random Signal Generator: The Random Signal Generator produces continuous bursts of random frequencies and waveshape from approximately 25 Hz to 20 kHz.
• 1x 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)
• 1x 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 24 dB/oct.
• 5x 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.
• 1x 911A Dual Trigger Delay: The 911A Dual Trigger Delay is designed to be used with 2 or more 911 Envelope Generators. It provides one or two time delays on an input trigger voltage - bound for the activation of an envelope switch trigger.
• 1x 914 Fixed Filter Bank: Similar in function to the Moog 907A Fixed Filter Bank, the 914 Extended Range Fixed Filter Bank is a non-voltage controlled modifier with 14 separate passband controls: high pass, low pass and 12 center frequency knobs.
• 1x 921 Voltage Controlled Oscillator: The 921 Voltage Controlled Oscillator is a variable waveform generator, which produces frequencies ranging from 0.01 Hz to 40 kHz. Four waveforms are available: Sine, Triangular, Sawtooth, and Rectangular (with variable duty cycle).
• 2x 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.
• 6x 921B Oscillators: The 921B Oscillator generates frequencies from 1 Hz to 40 kHz minimum. They are wired in groups to a common 921A Oscillator Driver, which provides both exponential frequency control and rectangular width voltage control.
• 1x 960 Sequential Controller: The 960 Sequential Controller has a wide variation of functions, both as an independent module and in combination with the 961 Interface and 962 Sequential Switch.
• 1x 961 Interface: Four independent circuits are found on the 961 Interface: one Audio-In to V-trigger Out circuit, one S-trigger In to V-Trigger Out circuit, and two V-trigger In to S-trigger Out circuits. All interface circuits may be used simultaneously, in combination, or separately.
• 1x 962 Sequential Switch: The 962 Sequential Switch selects between two or three signal inputs, coupling one signal to the output jack at a time. A V-trigger pulse introduced to the Shift Input initiates the sequence.
• 1x 992 Control Voltage Panel: The 992 Control Voltage Panel is used for routing up to four control voltage signals to the 904B Low Pass Filter. The fourth input on the panel contains a signal inverting attenuator circuit.
• 1x 993 Trigger and Envelope Voltages Panel: The Trigger and Envelope Voltages Panel is a signal routing module for S-triggers coming from one or two controllers. Lighted switches labeled "FROM 1" and "FROM 2" at the top of the panel connect the controller trigger outputs (when lighted) to the 911A Dual Trigger Delay.\
• 1x 994 Dual Multiples Panel: The multiple is a device, which permits multiple distribution of one signal to several different places. This process is often called signal splitting. Multiples are used for many purposes; from linking two patch cords together, sending a single signal to several different modules at the same time, to doubling or trebling the amplitude of a signal by sending it X3 to a particular source.
• 1x 995 Attenuator: Attenuators reduce the gain or amplitude of any applied input signal, control or audio. Moving clockwise from zero gain to unity with input, these attenuators can be used for reducing the effect of a control upon a voltage controlled module, providing up to three variable outputs from a single source input or reducing the gain of an entire signal complex.