Korg MS-20M Kit + SQ-1 Monophonic Synthesizer Module Kit

SKU: 002-01139

36,000 ฿ 40,000 ฿

The evolution of the MS-20, delivering even more powerful synthesis.
A module that you assemble, with a step sequencer included.

The classic MS-20 analog synthesizer that appeared in 1978 has been reborn as a perfect reproduction of the original circuit, first in 2013 as the mini-sized MS-20 mini, and now in 2014 as the MS-20 Kit that you can assemble yourself.

The MS-20 Mini and the Kit were designed by the engineers who developed the original MS-20. At its introduction, the designers of the MS-20 wanted to create an interesting product quickly; the result was an enormous hit, but the designers felt there were actually a few things left undone. Now, after 37 years, the user-assembled MS-20M Kit has been completed.

The MS-20M Kit is based on the MS-20 with additional improvements; it's an analog synthesizer module where you can choose your preferences and assemble yourself. In addition to greatly enhanced synthesis possibilities provided by oscillator sync, FM, two filters (pre and post), and PWM, there are jacks such as a CV IN that supports both Hz/V and V/Oct, making it play nicely with other equipment. You'll be able to immerse yourself in synthesis, and with the inclusion of the SQ-1 step sequencer you can also create and play sequences.

  • Significantly powered-up synthesis
    - SYNC ON/OFF switch allows oscillator sync
    - FM ON/OFF switch allows frequency modulation
    - FILTER TYPE switch selects two filter types
    - PWM IN jack allows pulse width modulation
    - EG2 NORMAL OUT expands your sonic possibilities
    - TRIG SW button is a convenient way to audition the sound
  • Plentiful connectors to control the sound from various devices
    - Supports all CV/GATE specifications: Hz/V and V/Oct, S-Trig and V-Trig
    - Three JUNCTION jacks
    - MIDI IN connector and USB MIDI connector
  • User-assembled kit with luxurious side panels
  • SQ-1 step sequencer included

Dramatically powered-up synthesis

Carrying on the distinctive synthesis of the MS-20, the MS-20M features additional improvements in both looks and functionality. Extending to detailed aspects of the design, the sound-creating possibilities have been dramatically boosted, making this sound module even more attractive and raising it to an even higher state of completion.

SYNC ON/OFF switch allows oscillator sync

Oscillator sync forcibly synchronizes the phase of VCO1 to the phase of VCO2, producing a powerful sound with complex overtones.

FM ON/OFF switch allows frequency modulation

The VCO1 waveform can be used to frequency-modulate the VCO2 waveform (FM or cross modulation), creating vibrato effects or extreme metallic sounds.

FILTER TYPE switch lets you select two types of filter

The original MS-20 used two different VCF circuits depending on the date of production, and now you can choose either of these with a single switch. The earlier model (REV.1) has an aggressive character with distinctive distortion and self-oscillation, while the later model (REV.2) has minimal noise and a sweet, mellow sound.

PWM IN jack allows pulse width modulation

The PWM provided on the MS-10 of the past is now possible on the MS-20. By cyclically modulating the pulse width of the VCO1 square wave, you can obtain a distinctively fat sound.

EG2 NORMAL OUT jack expands your sound-creating potential

In addition to the previous EG2 REV OUT, we've provided a normal EG2 OUT that varies in the range of 0V--+5V.

TRIG SW button lets you conveniently audition the sound

Even on this keyboardless unit, the trigger switch lets you smoothly audition the sound while you edit the parameters.

A rich array of jacks to control a variety of devices

Numerous jacks have been added to the MS-20M, letting you connect it with any type of device.

All CV/GATE specifications are supported: Hz/V and V/Oct, S-Trig and V-Trig

From the time when it was originally produced, the CV standard used by the MS-20 was not the commonly used V/Oct standard, but rather the Hz/V standard that provided superior pitch stability. However, like the MS-50 of that time, the MS-20M Kit provides CV IN jacks for both the Hz/V standard and the V/Oct standard.

For the TRIG IN jack that receives gate signals, jacks are provided not only for the S-Trig standard as on the original MS-20, but also for the widely used V-Trig standard. The MS-20M Kit supports any sequencer or controller that's equipped with CV/GATE output.

Three JUNCTION jacks

Three sets of the junction jacks once provided by the MS-50 are also provided. Output signals from the SQ-1 step sequencer or similar device can be converted from a mini-phone plug to a 1/4" phone plug, or those signals can be distributed to multiple destinations for a variety of possibilities.

MIDI IN connector and USB connector

There's a MIDI IN connector that can receive note messages, and a USB-MIDI connector that can transmit and receive note messages. You can perform using a taktile or other MIDI keyboard, or perform sequences that you've recorded on your DAW.

User-assembled kit with luxurious wooden side panels

The full-sized body supports 1/4" plugs and projects an aura of solidity. The side panels are luxurious wood, giving this unit some serious presence on your desk.

The MS-20M is a user-assembled kit. There is no need for any tricky soldering or knowledge of electronic circuits. Just by installing screws and fitting parts together, you'll get your very own analog sound.

SQ-1 step sequencer is included

The 2 x 8 step SQ-1 step sequencer is included. From the day you assemble the unit, you'll be able to immerse yourself in a limitless world of synthesis and sequencing.


Package contents of MS-20 Kit

Top panel, Bottom panel, Left side pane, Right side panel, Spacer sheet, Junction circuit board (small), Junction circuit board (large), Rear jack circuit board unit, VR circuit board (small), VR circuit board (large), Panel jack circuit board & switch VR circuit board, TRIG SW button, Nut A (x92), Washer A (x46), Nut B (x7), Nut C (x30), knurled nut (x3), Screw A (x4), Screw B (14), Spacer, Rubber bushing (x14), Rubber feet (x4), Knob (large) (x7), Knob (small) (x29), Cord hook, Box-end wrench (included), Mini-wrench (included)

MS-20M Kit Main Specifications

Signal IN jack (1/4" phone jack), Signal OUT jack (1/4" phone jack, 2Vp-p output impedance 3.5kΩ), PHONES jack (1/4" Stereo phone jack, 33Ω 48mW), DC12V jack, MIDI IN, USB type B
Power Supply
(W) x (D) x (H)
587 mm x 215 mm x 104 mm /23.11" x 8.47" x 4.09"
4 kg / 8.82 lbs.
Ten ø6.3 mm patch cables, three ø3.5 mm, patch cables, AC adapter (12V)

MS-20M Kit Specifications in details

Control Section
1. Voltage Controlled Oscillator 1(VCO 1)
:Scale (32', 16', 8', 4') (6 octaves, +cent, -cent)
:Wave form(Triangle, Sawtooth, PW-Square, White Noise) (4 modes)
:Pulse width adjust 1:1 ~ 1:infinity
2. Voltage Controlled Oscillator 2(VCO 2)
:Scale (16', 8', 4', 2') (6 octaves, +cent, -cent)
:Wave form(Sawtooth, Square, Pulse, Ring modulator) (4 modes)
:Pitch(± 2 octave)
3. VCO Master control : Master tune(± 100cent)
:Portamento(max. 10sec)
:Frequency modulation intensity by MG/T.EXT(-5V ~ +5V)
:Frequency modulation intensity by EG1/EXT(-5V ~ 0V)
4. VCO Mixer
:VCO 1 Level
:VCO 2 Level
5. Sync
:On/Off Slid SW(VCO1-->VCO2)
6. FM
:On/Off Slid SW(VCO1-->VCO2)
7. Voltage Controlled High Pass Filter (VCF HPF)
:Cutoff frequency(50Hz ~ 15,000Hz)
:Peak(flat ~ self OSC)
:Cutoff frequency modulation intensity by MG/T.EXT(-5V ~ +5V)
:Cutoff frequency modulation intensity by EG2/EXT(-5V ~ +5V)
8. Voltage Controlled Low Pass Filter (VCF LPF)
:Cutoff frequency(50Hz ~ 15,000Hz)
:Peak(flat ~ self OSC)
:Cutoff frequency modulation intensity by MG/T.EXT(-5V ~ +5V)
:Cutoff frequency modulation intensity by EG2/EXT(-5V ~ +5V)
9. Filter Type
:Select Slide SW(REV.1 / REV.2)
10. Envelope Generator 1
:Delay time(10sec)
:Attack time(10sec)
:Release time(10sec)
11. Envelope Generator 2
:Hold time(20sec)
:Attack time(10sec)
:Decay time(10sec)
:Sustain level(0V ~ 5V)
:Release time(10sec)
12. Modulation Generator (LFO)
:Wave form(Negative Sawtooth ~ Triangle ~ Positive Sawtooth, Wide Pulse ~ Square ~ Narrow Pulse)
:Frequency(0.1Hz ~ 20Hz)
13. Power switch and Volume
14. Indicator
:LED(Power On, EG1+EG2 trigger, Modulation Generator rate)
External Signal Processor
1. Control section
:Input signal level
:Low cut frequency(50Hz ~ 2,500Hz)
:High cut frequency(100Hz ~ 5,000Hz)
:CV adjust
:Threshold level
2. Input and Output
:Signal In
:Amplifier Out
:Band pass filter Out
:CV Out(0 ~ +8.4V)
:ENV Out(0 ~ +5V)
:Trig Out(+5V-->GND)
3. Indicator(LED)
:Peak indicator
:Trigger indicator
Patch Panel
1. CV IN(Hz/V)
:VCO 1 + VCO 2 control voltage input(Hz/V 0 ~ +8V)
2. CV IN(V/Oct)
:VCO 1 + VCO 2 control voltage input(V/Oct 0 ~ +5V)
:VCO control voltage output(Hz/V) (0 ~ +8V Caution: only MIDI IN)
:Trigger output(+5V-->GND Caution: only MIDI IN)
5. VCO
:VCO 1 + VCO 2 external frequency control input(V/Oct -5V ~ +5V)
:PWM for VCO 1 PW-Square
7. VCF
:External signal input(3Vp-p max.)
:External High pass filter cutoff frequency control input(2OCT/V)(-5V ~ +5V)
:External Low pass filter cutoff frequency control input(2OCT/V)(-5V ~ +5V)
8. VCO + VCF
:Total external modulation input(T.EXT)(-5V ~ +5V)
9. VCA
:External initial gain control input(0 ~ +5V)
10. EG
:EG 1 envelope signal normal output(0V 〜 +5V)
:EG 1 envelope signal reverse output(+5V ~ 0V)
:EG 1 + EG 2 trigger input(GND-->+5V ~ +15V)
:EG 1 + EG 2 trigger input(-->GND)
:EG 1 trigger input(-->GND)
:EG 2 envelope signal normal output(0V ~ +5V)
:EG 2 envelope signal reverse output(+5V ~ -5V Caution: Sustain Level=0V)
11. MG
:Triangle output(Negative Sawtooth ~ Triangle ~ Positive Sawtooth)(5Vp-p)
:Rectangle output(Wide Pulse ~ Square ~ Narrow Pulse)(0 ~ +5V)
12. Noise Generator
:Pink noise output(5Vp-p)
:White noise output(5Vp-p)
13. Sample and Hold
:Clock trigger input(-->GND)
:Sample signal input(5Vp-p max.)
:S/H output(5Vp-p max.)
14. Modulation VCA
:Control voltage input(0 ~ +5V)
:Signal input(-5V ~ +5V)
:Signal output(-5V ~ +5V)
:SW On-->TRIG IN(-->GND)
:Switch output(-->GND)
:3 x (1 x 3.5mm Stereo mini Phone Jack + 3 x 6.3mm Stereo Phone Jack)
1. Signal In
: Monaural phone jack
2. Signal out
: Monaural phone jack
: Maximum Output Level 2Vp-p
: Output Impedance 3.5kΩ
3. Head phones out
:Stereo phone jack
:Maximum Output Level 48mW (33Ω)
:Output Impedance 10Ω
:MIDI Input
* Only note messages (velocity is not used) can be received
* MIDI CH (1 - 16) can be changed
5. USB
:Type B, USB-MIDI Input/Output
* Only note messages (velocity is not used) can be transmitted and received
* MIDI CH (1 - 16) can be changed
Power Consumption
: 9.24W
Power Supply
: DC12V
(W) x (D) x (H)
587 x 211 x 104 mm /23.11" x 8.31" x 4.09"
4 kg / 8.82 lbs.
AC adapter (12V), ten ø6.3 mm patch cables, three ø3.5 mm patch cables

SQ-1 Specifications

Sequencer Mode
Step Mode
Sequence Step Resolution
quarter notes, eighth notes, sixteenth notes
CV OUT Pitch
Linear, Minor, Major, Chromatic
CV OUT Voltage
1V, 2V, 5V (Oct) 8V (/V)
GATE OUT Polarity
+ (positive polarity), - (negative polarity)
SYNC IN/OUT Polarity
+ (rise), - (fall)
- littleBits OUT jack (mini monaural phone jack)
- OUT (MIDI OUT) jack (mini stereo phone jack)
- CV - A OUT - GATE jack (mini monaural phone jack, CV OUT : Output level 1V, 2V, 5V, 8[Hz/V], GATE OUT: output level 10V)
- CV - BOUT - GATE jack (mini monaural phone jack, CV OUT : Output level 1V, 2V, 5V, 8[Hz/V], GATE OUT: output level 10V)
- IN – SYNC – OUT jack (mini monaural phone jack, SYNC IN: Max input level 20V, SYNC OUT: Output level 5V)
- USB jack (type B, USB MIDI)
Power Supply
Two AA batteries (alkaline batteries recommended), or USB power
Battery Life
approximately 5 hours (when using alkaline batteries)
(W x D x H)
193 x 84 x 63 mm/7.60" x 3.31" × 2.48"
641 g/1.41 lbs.
Two AA batteries for checking operation, mini plug – DIN cable
Patch cable MS-CABLE-18
* All product, company, and standard names are trademarks or registered trademarks of their respective holders.
* Appearance and specifications of products are subject to change without notice.

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