JARGON CRUNCHING

FRFR: Stands for Full Range Flat Response and typically relates to high-fidelity powered speakers that are designed to amplify the sounds from a modelling multi-effects unit without colouring or altering their tone. The multi-effects unit does the tone; the FRFR speaker does the 'loud'. impulse Response: This term refers to a system's output when presented with a very short input signal called an impulse. In everyday guitarist's language Impulse Response (often abbreviated to IR) is a way to map the acoustic properties of a speaker cabinet, for example, allowing it to be accurately emulated in digital devices such as Line 6's Helix.