10 audio loops arranged in a group of 6/4

  Last 2 audio loops stereo capability

  4 function control switches (Latched / Momentary)

  Mute function and Popping noise reduction control

  251 preset memory locations

  50 banks of 5 presets, plus a Global Preset

  5 presets per bank/song

  Song and Set mode

  Create up to 99 songs

  Organized the 99 songs in to 9 sets of 32 songs

  Trasmit up to 6 MIDI Program Change messages

  Trasmit up to 28 MIDI Control Change messages

  One expression pedal port (global / per preset)

  2 line x 16 character LCD display with blue backlight

  Easily copy presets, banks, songs and sets

  Easily name presets and songs

  Heavy-duty footswitches and gold-plated relays

  Powered by 12VDC(center negative) 300mA

  Dimensions : 332(W) x 126(D) x 70(H) mm

13.1(w) x 5.0(D) x 2.8(H) inches

  Weight : 1,320 g / 2.9 lbs


Top Panel ,  Rear panel




EFX MKIV Owner's Manual (English, version 2.00)

EFX MKIV Owner's Manual (Korean, version 2.00)



  Latest Firmware

Read this document thoroughly before updating to the firmware

EFX MKIV Firmware version 2.01



  EFX MKIV PC Editor (for Windows)

Download (2015. V1.0.38)

Make sure to update the latest firmware(V2.01) for your MKIV

before attempting to use the Editor software.


How to Use PC EDITOR on a MAC