Korg KR55Pro
KR-55 Pro


The Korg KR-55 Pro is a multi-function rhythm machine that’s also equipped with mixer/recorder functionality.

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.

Korg KR-55 Pro Features:

  • 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 Specifications:

  • Rhythm Function:
    • Rhythm Styles: 24 rhythm styles, two variations for each rhythm style, each variation has three patterns (basic, fill-in 1, fill-in 2), ending
    • Tempo: 48–240 bpm
    • Rhythm Chain function: 30 banks (up to 999 measures can be registered in each)
  • Recorder Function:
    • 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
    • Undo/Redo: Once
  • Player Function:
    • 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)
  • Mixer Effect Section:
    • Effects: Reverb effect
    • Equalizer: BASS, TREBLE
    • Other: ACOUSTAGE (wide stereo effect)
  • Tuner Function:
    • Scale: 12-note equal temperament
    • Type: Chromatic
    • Calibration: 435–445 Hz
    • Tuning Guide tone: Three types (guitar, bass, piano)
    • Display: 7-segment four-digit LED
  • SD Card: 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
    • AUX INPUT jack: 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:
    • LINE OUT L/R jack: 1/4" (6.3 mm) monaural phone jack (unbalanced), maximum Level: 0dBV 30mW 32 ohm
    • HEADPHONE jack: 1/8” (3.5 mm) stereo mini-phone jack, maximum Level: 0dBV 30mW 32 ohm
  • Power Supply:
    • 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
  • Dimensions (WxDxH): 13.66" × 8.78" × 2.68" (347 x 223 x 68 mm)
  • Weight: 3.09 lbs. (1.4 kg)(without batteries)
  • Included Items: AC adapter (DC 9V)
  • Accessories (Sold separately): VOX VFS5 Foot switch
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