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Sequential Pro-One

Released in 1981

Perhaps one of the most powerful and musical monosynths ever, the Sequential Circuits Pro-One is much more than a single voice from the Prophet 5. With a well-implemented modulation matrix, 24db filter, and 40-note step sequencer, the Pro-One sets the gold standard.

Pro-Ones were made with two different keybeds. Some used a membrane contact, with style K37U keys; the more reliable keybeds used J-wire contacts, with style K17U keys. If you are ordering keys or keybed parts, make sure you order for the correct keybed.

Sequential Pro-One
GALLERY
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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.

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Transformers
DIP connector, 16-pin
DIP connector, 16-pin
$5.95 (Part #1926)
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End panels, maple, Sequential Circuits Pro-One
End panels, maple, Sequential Circuits Pro-One
$79.95 (Part #8262)
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End panels, Sequential Circuits Pro-One
End panels, Sequential Circuits Pro-One
$79.95 (Part #7696)
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Fuse holder cap, red
Fuse holder cap, red
$8.95 (Part #5048)
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Fuse holder, black
Fuse holder, black
$19.95 (Part #2292)
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Fuse holder, red
Fuse holder, red
$19.95 (Part #5040)
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IC, 4049 hex inverter/buffer
IC, 4049 hex inverter/buffer
$2.95 (Part #2382)
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IC, AD558JN DAC
IC, AD558JN DAC
$23.95 (Part #11900)
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IC, AS3280 transconductance amplifier
IC, AS3280 transconductance amplifier
$11.95 (Part #6091)
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IC, CEM3310/AS3310 envelope generator
IC, CEM3310/AS3310 envelope generator
$12.95 (Part #3716)
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IC, CEM3320 filter
IC, CEM3320 filter
$16.95 (Part #3717)
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IC, CEM3340 oscillator
IC, CEM3340 oscillator
$29.95 (Part #3926)
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IC, LM348N op amp
IC, LM348N op amp
$2.95 (Part #5032)
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IC, NE5532 dual op amp
IC, NE5532 dual op amp
$3.95 (Part #5196)
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IC, TL072 op amp
IC, TL072 op amp
$2.95 (Part #3388)
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IC, TL082 op amp
IC, TL082 op amp
$2.95 (Part #3423)
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J-wire guide
J-wire guide
For J-wire keybed
$6.95 (Part #3182)
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Key bushing
Key bushing
For J-wire keybed
$0.74 (Part #4169)
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Key bushing kit, 37-note
Key bushing kit, 37-note
For J-wire keybed
$24.95 (Part #416937)
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Key bushings, bulk pkg (100)
Key bushings, bulk pkg (100)
For J-wire keybed
$59.95 (Part #4169B)
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Key return spring
Key return spring
For white keys, J-wire keybed only
$3.95 (Part #KYSP17)
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Key return spring
Key return spring
For black keys, J-wire keybed only
$3.95 (Part #KEYSPM)
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Knob, for Sequential Circuits
Knob, for Sequential Circuits
$8.95 (Part #4735)
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Phone jack, 1/4-inch, 3-pin PCB mount
Phone jack, 1/4-inch, 3-pin PCB mount
For Gate and CV jacks
$10.95 (Part #4989)
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Phone jack, 1/4-inch, 5-pin PCB mount
Phone jack, 1/4-inch, 5-pin PCB mount
For Audio In, Audio Out
$10.95 (Part #4990)
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Pitch bend/mod wheel, Sequential
Pitch bend/mod wheel, Sequential
$19.95 (Part #5609)
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Potentiometer shaft
Potentiometer shaft
For all front panel pots
$9.95 (Part #7201)
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Potentiometer, 100KB rotary
Potentiometer, 100KB rotary
For all front panel pots
$19.95 (Part #4816)
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Potentiometer, 100KB rotary
Potentiometer, 100KB rotary
For pitch or mod wheel
$8.95 (Part #5764)
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Power switch, rocker type
Power switch, rocker type
For Pro-One with switch directly above AC cord
$7.95 (Part #7981)
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Ribbon cable, 12-inch with DIP connectors
Ribbon cable, 12-inch with DIP connectors
For J-wire keybed
$19.95 (Part #1425)
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Rotary switch, 4-position
Rotary switch, 4-position
$16.95 (Part #4988)
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Rubber foot, 3/8-inch tall
Rubber foot, 3/8-inch tall
$1.95 (Part #4021)
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Screws, for keytops, pkg of 10
Screws, for keytops, pkg of 10
For J-wire keybed
$3.95 (Part #3923)
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Sequential Circuits badge, small
Sequential Circuits badge, small
$14.95 (Part #4803)
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Style 17U key, black note
Style 17U key, black note
For J-wire keybed
$13.95 (Part #K17UBL)
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Style 17U key, note A
For J-wire keybed
$17.95 (Part #K17UA)
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Style 17U key, note B
For J-wire keybed
$17.95 (Part #K17UB)
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Style 17U key, note C
For J-wire keybed
$17.95 (Part #K17UC)
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Style 17U key, note D
For J-wire keybed
$17.95 (Part #K17UD)
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Style 17U key, note E
For J-wire keybed
$17.95 (Part #K17UE)
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Style 17U key, note F
For J-wire keybed
$17.95 (Part #K17UF)
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Style 17U key, note G
For J-wire keybed
$17.95 (Part #K17UG)
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Style 17U key, top C note
Style 17U key, top C note
For J-wire keybed
$24.95 (Part #K17UC8)
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Style 37U key, black note
Style 37U key, black note
For membrane-switch keybed
$9.95 (Part #K37UBL)
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Style 37U key, note A
For membrane-switch keybed
$10.95 (Part #K37UA)
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Style 37U key, note B
For membrane-switch keybed
$10.95 (Part #K37UB)
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Style 37U key, note C
Style 37U key, note C
For membrane-switch keybed
$10.95 (Part #K37UC)
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Style 37U key, note D
For membrane-switch keybed
$10.95 (Part #K37UD)
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Style 37U key, note E
For membrane-switch keybed
$10.95 (Part #K37UE)
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Style 37U key, note F
Style 37U key, note F
For membrane-switch keybed
$10.95 (Part #K37UF)
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Style 37U key, note G
For membrane-switch keybed
$10.95 (Part #K37UG)
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Style 37U key, top C note
For membrane-switch keybed
$16.95 (Part #K37UC8)
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Syntaur control voltage pedal
Syntaur control voltage pedal
For Filter CV In
$84.95 (Part #CVP100)
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Transformer
Transformer
$36.95 (Part #4977)
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Voltage regulator, 78M15
Voltage regulator, 78M15
$2.95 (Part #4412)
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Voltage regulator, 7905
Voltage regulator, 7905
$2.95 (Part #2255)
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Voltage regulator, 79M15
Voltage regulator, 79M15
$2.95 (Part #2415)
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Voltage regulator, LM320T-15
Voltage regulator, LM320T-15
$3.95 (Part #2682)
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