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Oberheim OB-SX

Analog Polyphonic Synthesizer

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OB-SX 1OB-SX 2OB-SX 3OB-SX 4
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Oberheim OB-SX
Oberheim OB-SX
2 500.00 street price

OB-SX is the cheaper and lighter version of OB-X.

Just like its "big brother" it was based on a modular system and was produced with two, four or six voice cards. But the cards are not interchangeable/not compatible with OB-X.

Each voice card has:
Two VCOs built on specialized CEM3340 chips.
VCF LP based on CEM3320, has a cutoff slope of 12 dB per octave.
Two envelope generators. One for VCF, the second for VCA. It is built on CEM3310.
One discrete voltage controlled amplifier (VCA).

The synthesizer includes a modulatable low-frequency oscillator (LFO) producing a triangular and square wave.

Country of origin / production: USA

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More info
 
Usage area
Synthesizer 
Usage Design/ Form Factor
With Keys 
Archetype
Hybrid, Digital+Analog 
Polyphony
Voices6
Tone Generator / Sound Synthesis
Oscillator Type VCO (Voltage Controlled Oscillator)
Oscillators per voice6
Waveform/ Spectral form (main generator) Square
Waveform/ Spectral form (main generator) Saw
Programs/ Voices/ Timbres
Patches56
Filter
Low-pass Filter (LPF) 
12dB 
Resonance 
Envelope Generator (EG)
Attack 
Decay 
Sustain 
Release 
Keys
Type Synth Action
Size4
Number of Keys48
Built-in controllers
Pitch Bend Wheel 
Modulation Wheel 
Audio out
Mono 
Analogue: 1/4" (6.35mm)1
Power
Voltage 230V
Voltage 115/117V
Voltage 50-60Hz
Power Supply Built-in, internal
Case/ body
Metal&wood 
Color
Black 
Production start1980
Production end1983
Production ended

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