Tom Oberheim Synthesizer Expander Moduler SEM Now Available

tom-oberheim-sem-synthesizer-expander-module

Tom Oberheim has reissued the classic SEM monophonic analog synthesizer expander module, and it’s now available via AudioMIDI.

Description:

Originally released in 1974, the SEM is one of the classic discrete analog synths, with a huge, three-dimensional “fat” tone. Oberheim’s reissue cuts no corners – the circuitry is almost identical to original units. The only component changes were made due to unavailable parts, but the great tone has not been affected. No digital voice circuits, or thin-sounding analog “voice chips” here- only genuine hi-fi fat analog goodness.

This version includes a panel with 33 direct-access patch points on 1/8″ jacks, transforming the SEM into a powerful “mini-modular” synthesizer. Not only does this allow tremendous voicing flexibility when used standalone, it allows easy interfacing with modular synthesizers or additonal SEM modules for limitless potential.

Pricing:

  • Tom Oberheim Synthesizer Expander Module with Patch Panel – $789.00
  • Tom Oberheim Synthesizer Expander Module with MIDI to CV Panel – $899.00
  • Tom Oberheim Synthesizer Expander Module (SEM) Panel Only Version – $599.00

Specifications:
Single-Voice Monophonic Analog Synthesizer

  • Two oscillators, each with sawtooth and variable-pulse wave, pulse width and frequency modulation amount, ext envelope and LFO modulation select switches
  • Oscillator sync
  • 12db/oct multimode filter with continuously variable lowpass, bandpass, and highpass modes, ext envelope and LFO modulation select switches.
  • Filter input mixer with continuously variable saw to pulse wave mix for each oscillator and external input amount for processing external sources.
  • Two attack/decay/sustain envelope generators
  • Sine wave low frequency oscillator with speed control
  • Patch Panel Connections

    connection pin
    function direction
    A1
    VCO 1 – External Modulation
    input
    A2
    VCO 1 – Sawtooth Waveform
    output
    A3
    VCO 1 – Sawtooth Waveform
    output
    B1
    VCO 1 – Control Voltage #1
    input
    B2
    Ground
    B3
    VCO 1 – Control Voltage #2
    input
    C1
    VCO 1 – Sync Output
    output
    C2
    Ground
    C3
    VCO 1 – Sync Input
    input
    D1
    VCO 2 – Control Voltage #1
    input
    D2
    Ground
    D3
    VCO 2 – Control Voltage #2
    input
    E1
    VCO 2 – External Modulation
    input
    E2
    VCO 2 – Sawtooth Waveform
    output
    E3
    VCO 2 – Pulse Waveform
    output
    F1
    VCO 2 – Sync Output
    output
    F2
    VCA – Control Input
    input
    F3
    VCO 2 – Sync Input
    input
    G1
    LFO Trigger
    input
    G2
    Ground
    G3
    LFO Waveform
    output
    H1
    VCF – Control Voltage #1
    input
    H2
    VCF – Control Voltage #2
    input
    H3
    VCF – External Modulation
    input
    I1
    VCA Output
    output
    I2
    Ground
    I3
    Unused
    J1
    VCF – Highpass Signal
    output
    J2
    Ground
    J3
    VCF – Bandpass Signal
    output
    K1
    Selected VCF Response
    output
    K2
    Ground
    K3
    Ground
    L1
    External Audio Input #1
    input
    L2
    Ground
    L3
    (duplicate of L1 – not used)
    M1
    External Audio Input #2
    input
    M2
    Ground
    M3
    (duplicate of M1 – not used)
    X1
    ENV 1 – Output
    output
    X2
    ENV 1 – Gate
    input
    X3
    ENV 1 – Trigger
    input
    Y1
    ENV 2 – Output
    output
    Y2
    ENV 2 – Gate
    input
    Y3
    ENV 2 – Trigger
    input

    Complete electrical specs provided in the User’s Manual.

  • Dimensions: 11.50″ x 8.375″ x 5.25″
  • Weight: 6 lbs
  • Power: 100 – 240 volts, 50-60 Hz, built-in mains transformer
  • One thought on “Tom Oberheim Synthesizer Expander Moduler SEM Now Available

    1. It needs to be available in Europe too…I was about to order one but i've changed my mind because i don't want to mess with the custom's office and pay half of the price for taxes…

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