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Experience the same musical support as if a pro drummer were sitting in on your session. The KR-55 Pro gives you an easy way to enjoy jam sessions with the backing of real drum/percussion sounds. It provides a rich variety of input jacks, mixer functionality, effects, and equalizer, as well as a versatile recorder that can record to an SD card. The intuitive interface means that there’s no need for complex programming. Battery-powered operation allows complete mobility from desktop to street performances, or use in a variety of situations including live events in small spaces.


  • 24 built-in drum/percussion styles that were recorded live using KORG’s proprietary “Real Groove Technology.”
  • Each rhythm style includes a rich variety of patterns: two variations, basic, fill-in 1, fill-in 2, and ending.
  • Use the chain function to create a rhythm structure for an entire song, and play it automatically.
  • A rich array of input jacks includes one XLR mic input, two guitar/bass inputs, and a stereo AUX input, allowing multi-channel mixing.
  • A high-quality reverb effect and equalizer are provided, giving you the freedom to shape your sound.
  • You can perform along with a rhythm style, and record the combined result as an audio file on an SD card.
  • Multi-track recording is supported, allowing you to produce more sophisticated tracks.
  • The tuner function features a large meter for good visibility. You can also tune while hearing a guide tone.
  • Acoustage technology delivers a spacious sound.
  • The unit can be powered on six AA batteries, allowing up to seven hours of use.
  • A separately sold foot switch lets you control the unit with your foot.

KORG KR-55 Pro Drum Machine with Live Recorded Rhythms, Multiple Inputs


Rhythm Styles

24 rhythm styles, two variations for each rhythm style, each variation has three patterns (basic, fill-in 1, fill-in 2), ending


48–240 bpm

Rhythm Chain function

30 banks (up to 999 measures can be registered in each)


Recording format

PCM audio WAV format (file name extension .wav), 44.1 kHz, 16-bit

Recording time

Depends on the SD card used; approximately 100 minutes per 1 GB

Maximum continuous recording time

3 hours

Number of songs

Maximum 50

Number of multitrack recordings

Depends on the remaining free capacity of the SD card




Playback formats

PCM audio WAV format (file name extension .wav) 44.1 kHz, 16-bit, Stereo

Maximum data size (time)

Depends on the memory card used; approximately 100 minutes per 1 GB (for WAV data)

Maximum number of data files (number of folders)

Up to 99 songs (per folder); a total of eight folders M1–M8 inside the PLAYER folder can be used.

Playlist function

10 banks (up to 24 songs can be registered in each)



Reverb effect




ACOUSTAGE (wide stereo effect)



Tuner Function


12-note equal temperament




435–445 Hz

Tuning Guide tone

Three types (guitar, bass, piano)Display



7-segment four-digit LED


Usable SD cards

SDHC card 4 GB–32 GB (recommendation)


Input Jacks

MIC IN jacks

XLR-3-32 type (balanced), input impedance 4.7k ohm, nominal level -43 dBV

INPUT 1 jack, INPUT 2 jack (guitar, bass)

1/4" (6.3 mm) monaural phone jack (unbalanced), input impedance 1M ohm, nominal level -26 dBV


1/8” (3.5 mm) stereo mini-phone jack (unbalanced), input impedance 10k ohm, nominal level -17 dBV

FOOT SW jack

1/4” (6.3 mm) stereo phone jack, usable foot switch: VOX VFS5 foot switch


Output Jacks


1/4" (6.3 mm) monaural phone jack (unbalanced), maximum Level: 0dBV 30mW 32 ohm


1/8” (3.5 mm) stereo mini-phone jack, maximum Level: 0dBV 30mW 32 ohm


Power Supply

DC 9V, six AA batteries (alkaline or nickel-metal hydride are supported)

Battery Life

Approximately 7 hours (when using alkaline batteries or nickel-metal hydride batteries) 
* Varies depending on the batteries used and the conditions of use

Current Consumption

330m A

Power Supply

Dimensions (W x D x H)

244 x 220 x 68 mm / 9.61" × 8.66" × 2.68"


1.4 kg / 3.09 lbs. (without batteries)

Included Items

AC adapter (DC 9V)

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