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The following is a guide to the acronyms and abbreviations that are used in relation to the Axe-Fx:

  • FOH - Front Of House - the main PA system that an audience hears at a live show
  • FRFR - Full Range, Flat Response - a speaker that is even across the whole audio spectrum
  • IA - Instant Access - a configurable foot switch on a MIDI controller
  • IEM - In-Ear Monitor - earbud headphones that block the ear canal and thus most external noise
  • IR - Impulse response - the output of a device (speaker cabinet, effect, etc.) when an impulse is played into the input