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KEY FEATURESControls up to 12 parallel 921B OSCILLATOR modules
Authentic reproduction of the circuitry from the "Modular 55 & 35" Series
Artist roster includes world's most famous pop, rock and jazz musicians
2 summed CV inputs for frequency control and 2 summed CV inputs for PWM
High current outputs for frequency and pulse width to drive multiple 921B modules
Switchable semitone/octave selector and manual pulse width control
Eurorack specs: 8 HP, 15 mA +12 V, 15 mA -12 V
DESCRIPTION
The first System 55, 35 and 15 synth modules came out in the early 70s and tended to be extremely expensive. They were mainly all discrete transistor designs as op-amps at the time were very high cost. The discrete circuitry gave the modules a very distinctive sound and were used by artists like Keith Emerson, Stevie Wonder, Tangerine Dream and so many more, giving us some of the greatest records we’ve ever heard. Modular synths were a landmark development in electronic music and today, it’s about to get better.
SPECIFICATIONS
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Controls |
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Frequency |
1 x rotary knob ±6 octaves / ±12 semitone, switchable |
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Semitone / octave |
Rocker switch, ±1 VDC or ±6 VDC |
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Width of rectangular wave |
< 10% to > 90%, 0 VDC to +6 VDC |
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Signal Connections |
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Frequency control inputs |
2 x 3.5 mm jack, summed, 1 V/oct. |
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Rectangular width control inputs |
2 x summed 3.5 mm jack, 1 V/16% |
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Input Impedance |
100 kΩ unbalanced |
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Maximum input level |
-10 VDC to +10 VDC |
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Frequency control output |
1 x 3.5 mm jack, 1 V/oct. |
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Rectangular width control output |
1 x 3.5 mm jack, 1 V/16% |
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Output Impedance |
10 Ω unbalanced |
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Maximum output level |
-10 VDC to +10 VDC |
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Drive capability |
12 x 921B VCO modules |
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Power |
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Power supply |
Eurorack |
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Current draw |
25 mA (+12 V), 25 mA (-12 V) |
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Physical |
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Dimensions |
40 x 129 x 35 mm (1.6 x 5.1 x 1.4") |
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Rack units |
8 HP |
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Weight |
0.09 kg (0.20 lbs) |
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