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Teisco Synthesizer SX-400

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    Teisco released the 4 voice SX-400 in 1981 which features stereo sound and 16 preset memories. 8 of which are user memories. A nice feature of the SX-400 is aftertouch and it's pitch knobs that can have multiple destinations simultaneously. It also features a Chorus Effect and offers CV gate control.

    The unit also has stereo output and can be played in one of 4 modes. Quad: one VCO can be assigned to one key at a time and played as in a chord.
    Dual: 2 VCO's are assigned to one key at a time and can be played as 4 notes for a thicker sound. Mono: 4 VCO's are assigned to one key at time but only one voice can be heard at a time.

    Type: Analog
    Synthesis: Subtractive
    Oscillators: 1
    Waveforms: Pulse, Pulse Variable, Saw Down, Saw Up, Sub Oscillator, Triangle, White Noise
    Osc Modulation: After Touch, Envelope, Knob, LFO
    Envelopes: 2
    Evelope Paramerters: Attack, Decay, Sustain, Release
    Filters: 2
    Types: 24dB Slope (4-pole), High Pass, Low Pass, Resonance
    Filter Modulation: After Touch, Knob, LFO
    LFO: 2
    LFO Parameters: Saw Up, Saw Down, Sine, Triangle
    Polyphony & Tuning
    Polyphony: 4
    Timbrality: 1
    Tuning: Standard
    Modes: Duophonic, Mono, Polyphonic
    Patches RAM: 8
    Patches ROM: 8
    Storage: Internal
    Editing: CV
    Case: Keyboard
    Case Details: Solid wood and metal casing
    Keyboard: 49 keys
    Controls: Buttons, Faders, Knobs, Switches
    Dimensions (WxDxH): 155 mm x 945 mm x 510 mm
    Weight: 22 kg
    Audio Output Connections: 1/4" Phone Jack, Stereo Main, Stereo Headphone
    Audio Output Count: 3
    CV Ports: CV IN, CV OUT
    Power: 25 watts
    Year Released: 1981
    Year Discontinued: 1982
    Manuals & Documents
    Used Price: $300-$1800 - convert
    YouTube Videos
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