Oberheim 2, 4, 8-Voice

Released in 1975

The SEM (Synthesizer Expander Module) was Oberheim's first synthesizer, and two of these plus a sequencer module and 37-note keyboard were combined to make the Oberheim 2-voice. The 4-Voice (pictured) was a combination of four SEMs, sequencer, and 49-note keyboard. The 8-Voice (1977) had 8 SEMs, a 49-note keyboard, and a programmer module, and can be used polyphonically.

Oberheim 2, 4, 8-Voice
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We stock both NEW and USED parts; all used electronic parts are tested and guaranteed working.

This listing reflects our current inventory and is updated in real time. If a part is shown as Out of Stock, we typically don't know when or if we might have it again - but click on the part for more info, and then you will be able to sign up for an alert when we do have it available again. By including out of stock parts in our listings, we hope to offer customers a more complete and useful resource.

We cannot diagnose repair issues by phone or email. For technical questions, we suggest posting on our Forums, where our techs - as well as other users - can offer help.

Diode, 1N4002
Diode, 1N4002
$0.95 (Part #7994)
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Diode, 1N4148
Diode, 1N4148
$0.95 (Part #3788)
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IC, 3080 OTA
IC, 3080 OTA
$8.95 (Part #3298)
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IC, 3086 transistor array
IC, 3086 transistor array
$7.95 (Part #3975)
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IC, 4001 quad NOR gate
IC, 4001 quad NOR gate
$2.95 (Part #3304)
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IC, 4002 quad NOR gate
IC, 4002 quad NOR gate
$2.95 (Part #3350)
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IC, 4011 quad gate
IC, 4011 quad gate
$2.95 (Part #3391)
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IC, 4013 flip-flop
IC, 4013 flip-flop
$2.95 (Part #3322)
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IC, 4016 quad analog switch
IC, 4016 quad analog switch
$2.95 (Part #3302)
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IC, 40174 flip-flop (replaces 14174)
IC, 40174 flip-flop (replaces 14174)
$2.95 (Part #3305)
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IC, 4028 decoder
IC, 4028 decoder
$2.95 (Part #1945)
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IC, 4030 quad exclusive OR gate
IC, 4030 quad exclusive OR gate
$3.95 (Part #3303)
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IC, 723 linear regulator
IC, 723 linear regulator
$3.95 (Part #3428)
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IC, 741 op amp
IC, 741 op amp
$2.95 (Part #3297)
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IC, LM301 op amp
IC, LM301 op amp
$3.95 (Part #3300)
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IC, UA308TC or NTE938M op amp
IC, UA308TC or NTE938M op amp
$15.95 (Part #3296)
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J-wire guide
J-wire guide
$5.95 (Part #3182)
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Key bracket, black key
Key bracket, black key
For models with K34U keys
$4.95 (Part #PRKBB)
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Key bracket, white key
Key bracket, white key
For models with K34U keys
$4.95 (Part #PRKB)
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Key bushing
Key bushing
$0.70 (Part #4169)
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Key bushing kit, 37-note
Key bushing kit, 37-note
For 2-Voice
$19.95 (Part #416937)
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Key bushing kit, 49-note
Key bushing kit, 49-note
For 4-Voice and 8-Voice
$27.95 (Part #416949)
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Key return spring
Key return spring
For K34U black keys
$2.95 (Part #KYSP16)
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Key return spring
Key return spring
For K17U white keys
$2.95 (Part #KYSP17)
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Key return spring
Key return spring
For K34U white keys
$3.95 (Part #KEYSPM)
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Key return spring
Key return spring
For K34U white keys
$3.95 (Part #KEYSPM)
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Knob cap, black
Knob cap, black
For all except VCO Frequency
$2.45 (Part #7791)
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Knob cap, black
Knob cap, black
For SEM VCO Frequency (upper knobs), Mini Sequencer CV Preset knobs
$2.95 (Part #2635)
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Knob pointer
Knob pointer
(This pointer is slightly smaller than the original SEM pointers)
$1.95 (Part #7789)
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Knob, large collet
Knob, large collet
(Regular knobs use #7789 pointer, top row of knobs use a larger skirt which is no longer available. )
$6.95 (Part #7790)
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Knob, small collet
Knob, small collet
Upper knob for for SEM VCO Frequency, Mini Sequencer CV Preset
$6.95 (Part #7788)
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LED mounting clip
LED mounting clip
$2.95 (Part #3230)
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Phone jack, 3.5mm
Phone jack, 3.5mm
$7.95 (Part #5087)
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Potentiometer, 47KA with switch
Potentiometer, 47KA with switch
For VCF Notch
$16.95 (Part #7198)
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Power cord, Arp/Oberheim style
Power cord, Arp/Oberheim style
$19.95 (Part #PCARP)
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Screws, for keytops, pkg of 10
Screws, for keytops, pkg of 10
$3.95 (Part #3923)
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Slide switch, 2-position
Slide switch, 2-position
For Sync, VCA
$9.95 (Part #5006)
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Slide switch, 2P3T
Slide switch, 2P3T
For Modulation switches
$12.95 (Part #5007)
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Style 17U key, black note
For later models
$13.95 (Part #K17UBL)
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Style 17U key, note A
For later models
$17.95 (Part #K17UA)
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Style 17U key, note B
For later models
$17.95 (Part #K17UB)
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Style 17U key, note C
For later models
$17.95 (Part #K17UC)
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Style 17U key, note D
For later models
$17.95 (Part #K17UD)
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Style 17U key, note E
For later models
$17.95 (Part #K17UE)
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Style 17U key, note F
For later models
$17.95 (Part #K17UF)
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Style 17U key, note G
For later models
$17.95 (Part #K17UG)
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Style 17U key, top C note
For later models
$24.95 (Part #K17UC8)
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Style 34U key, black note
For early models
$10.95 (Part #K34UBL)
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Style 34U key, note A
Style 34U key, note A
For early models
$12.95 (Part #K34UA)
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Style 34U key, note B
For early models
$12.95 (Part #K34UB)
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Style 34U key, note C
For early models
$12.95 (Part #K34UC)
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Style 34U key, note D
For early models
$12.95 (Part #K34UD)
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Style 34U key, note E
For early models
$12.95 (Part #K34UE)
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Style 34U key, note F
For early models
$12.95 (Part #K34UF)
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Style 34U key, note G
For early models
$12.95 (Part #K34UG)
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Style 34U key, top C note
For early models
$17.95 (Part #K34UC8)
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Transistor, 2N3904
Transistor, 2N3904
$1.95 (Part #5176)
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Transistor, 2N3905
Transistor, 2N3905
$1.95 (Part #7447)
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Transistor, 2N5172
Transistor, 2N5172
$1.95 (Part #3295)
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