Skip to main content Skip to footer
Save 15% on a qualifying item of $79 or more when you call 866-498-7882. Now thru March 24.

Korg RK-100S Keytar with MMT Red

Item #: 
1393862857279   POS #:110157534
  • Write a Review

Appearing in 1984, the RK-100 remote keyboard broke the chains of keyboardists, setting them free to perform as they liked. With a stylish body available in four colors, it allowed the keyboard player... Click To Read More About This Product

We're sorry—we no longer carry this item.

Find a similar product below or contact us for a recommendation of a great alternative.

Call: 866-498-7882 Email

Recommended Products

Appearing in 1984, the RK-100 remote keyboard broke the chains of keyboardists, setting them free to perform as they liked. With a stylish body available in four colors, it allowed the keyboard player to challenge the vocalist or guitarist for the main role on stage.

Now, thirty years later, the RK has been resurrected. Although beautiful curved surfaces have been added, the essence of the original and very popular design is unchanged. What had been a somewhat large and heavy body has been made more compact and lightweight thanks to modern components such as a slim keyboard. While the original required an external sound module, the new RK-100S contains a built-in analog modeling sound generator.

New features and functions include two ribbon controllers, an arpeggiator, and a vocoder, and there are also "favorite" buttons that allow you to register frequently-used sounds for one-touch selection. The RK-100S is your choice for smarter, more active, and more enjoyable performance.

Two hundred built-in programs powered by analog modeling
The RK-100S provides a built-in sound engine that was not found on the original RK, meaning that you can perform simply by connecting an audio cable.

Its MMT sound engine provides not only the standard analog synthesizer waveforms such as sawtooth and square, but also additional oscillator algorithms such as formant waveforms, noise, and PCM, which power two hundred programs for a broad range of sounds that will cover any musical genre. These sounds can also be played using the arpeggiator.

37-note slim keyboard that's lightweight and easy to play
The keyboard of the RK-100S uses the 37-note slim keyboard also featured on the MS-20 mini. This allows the overall unit to be more compact and lightweight. MS-20 mini-style keys provide the perfect balance between size and playability.

Two ribbon controllers, short and long
Since the RK-100S is designed for active playing styles, it features two ribbon controllers: a short ribbon on the neck that can be manipulated with the left hand, and a long ribbon located in front of the keyboard that gives you a wide range of performance possibilities. The long ribbon controller can be used instead of the keyboard to play a freely specified range of pitches and scales, and can also be used to control the pitch or filter in dramatic ways.

Operates on six AA alkaline batteries
Since the RK-100S will operate on easily obtainable alkaline AA batteries or rechargeable nickel-metal hydride AA batteries, you can enjoy performing anywhere simply by plugging in a set of headphones or by connecting it to your amp with a standard cable. By using an AC adapter, you can play at home for as long as you like without being concerned with battery life, and use the PC editor to create your own sounds.

Mic/audio (dual-purpose) input jack, also usable with the vocoder function
The RK-100S provides a monaural mini-input jack that can also work with mic input. You can use a headset mic to enjoy vocoder performance, or connect your audio player and perform along with your favorite music.

Perform with an external sound module, and use the PC editor for detailed editing
Since the RK-100S is equipped with a MIDI output jack, it can be used to control an external sound module. There's also a USB port for connecting it to your computer, allowing you to control a PC sound module or use the PC editor to edit detailed MIDI settings and parameters of the internal sound engine.


  • Built-in sound engine, just plug in and play
  • 37-note slim keyboard
  • 200 built-in programs with analog modeling
  • 2 ribbon controllers, short and long
  • Mic/audio input jack, also usable with the vocoder function
  • Perform with an external sound module, and use the PC editor for detailed editing
  • Operates on 6 AA batteries
  • : 37-key (Slimkey, velocity sensitive, no after touch)
Sound Generation System
  • : MMT (Multiple Modeling Technology)
  • Number of timbres: Maximum 2 (when using Layer, Split, or Multi)
  • Polyphony: Maximum 8 voices (Maximum 4 voices when the vocoder is selected)
  • Synth: 2 oscillator + noise generator
  • Oscillator 2: Waveform: SAW, PULSE, TRIANGLE, SINE
  • Modulation: RING, SYNC, RING+SYNC
  • Multi-mode filters: Filter 1: -24 dB/oct LPF -12 dB/oct LPF HPF BPF Thru Filter 2: LPF, HPF, BPF F
  • 16-band vocoder, adjustable level and pan for each band, Formant Shift function, Formant Hold function
  • Timbre: 2-band EQ
  • Master effects x 2: 17 effect algorithm Master effects
  • : UP, DOWN, ALT1/2, Random, Trigger (6 types), Step Arpeggiator function
  • : 200 programs
Audio Input/Output
  • Input:
  • Input jack
  • Maximum input level: -34 dBu @ Input select switch (Mic-Hi / Mic-Lo / Line)
  • Imput impedance: 14kÎ
  • Connector Type: mono mini jack
  • Output:
  • Output jack (Headphone, Stereo, Line out)
  • Maximum output level:+4dBu@10kÎ load
  • Output impedance: 1kÎ
  • Connector type:φ6.3 mm, stereo phone jack
  • : OUT
  • : Type B
  • : 7-segment LEDs, 3 digits
Power Supply
  • : Six AA batteries (alkaline or nickel-metal hydride), or Optional AC adapter (DC 9 V)
Battery Life:
  • Approx. 4 hours
  • :
  • (W) x (D) x (H)
  • 830 x 262 x 71 mm/32.68 x 10.32 x 2.80 inches
  • :
  • 3.4 kg/ 7.50 lbs. (included batteries)
  • :
  • Manual
  • Strap
  • Soft Case
  • AA alkaline Batteries x6 (for verifying operation)
KORG USB-MIDI DriverOperating Requirements
  • Windows
  • Operating System:
  • Microsoft Windows XP Home/Professional SP3
  • Microsoft Windows Vista SP2 (all editions including 64-bit edition)
  • Microsoft Windows 7 SP1 (all editions including 64-bit edition)
  • Microsoft Windows 8 (all editions including 64-bit edition)
  • Supported Computer:
  • A computer that is equipped with a USB port (Intel USB Host Controller recommended)
  • Mac OS
  • Operating System:
  • Mac OS X version 10.5, 10.6, 10.7, 10.8
  • Supported Computer:
  • An Apple Macintosh computer that satisfies the operating requirements of Mac OS X and is equipped with an Intel processor and a USB port
RK-100S Sound EditorOperating System Requirements
  • Windows
  • OS:
  • Microsoft Windows 7 SP1, or later
  • Mac OS
  • OS:
  • Mac OS X version 10.6.8 or later
Pro Coverage
Manufacturer's Warranty
USA Warranty Policy

All Korg products purchased from a Korg USA authorized dealer are warranted to be free from defects in material and workmanship to the original consumer purchaser as listed below:

Labor: 1 Year
Parts: 1 Year

Exceptions: Tubes, AC Adapters, Foot Switches: 90 days

Warranty Requirements and Limitations:

-Proof of Warranty - The customer must provide proof of purchase in order to obtain warranty service. The dated sales slip or copy thereof is the only acceptable proof of purchase.

-The product must be purchased from a Korg USA authorized dealer and have a valid serial number.

Damage resulting from the following causes are excluded from the warranty set forth above:
-Misuse, including damage occurring during shipment, damage caused by battery leakage, accident, fire, unauthorized repairs, tampering, cosmetic damage or other types of damage which are the result of improper handling or abuse.
-The cleaning of controls or contacts due to exposure to dirty, dusty, or otherwise contaminated environment.
-Damage resulting from modification.
-Damage to units used for loan or rental.

Register online and extend your warranty!
Register your new Korg keyboard, keyboard rack module or digital piano online and receive a certificate that extends the product warranty for an extra year from the date of purchase.

Customer Reviews

Review Snapshot

by PowerReviews
KorgRK-100S Keytar with MMT

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to Top

(16 of 17 customers found this review helpful)


Only one major complaint about this keyboard...

By Dave

from Austin TX

About Me Professional Musician

Verified Buyer


  • Easy to Use
  • Portable
  • Realistic Sound
  • Responsive / Good Action


    Best Uses

      Comments about Korg RK-100S Keytar with MMT:

      I really love a lot of things about this keyboard. I think the tones are great, it feels great to hold, its sexy, and i think its reasonably priced. I only have one major complaint about this keyboard and that would be the location of the volume knob. Honestly I'm blown away that they would put it down in the lower right hand corner of the instrument. I use this keyboard exclusively for lead playing, taking solos and such. if the volume isn't adusted exactly right (and when playing in a 10 peice funk band, it rarely is) the tone just doesn't come through. This is a problem because the volume knob is impossible to manipulate while your fingers are on the keys. It would have made way more sense to put the volume control on the neck of the keytar.

      Overall i still love the thing, but I'm considering doing a custom mod to move the volume knob. It may not be pretty but i love the rest of th keyboard enough to try it out.

      Displaying review 1

      Back to Top

      You are changing the Ship-To country.

      Our product catalog varies by country due to manufacturer restrictions. If you change the Ship-To country, some or all of the items in your cart may not ship to the new destination.