Active

An active device in audio requires an external power source to function and typically includes internal circuitry for amplification or processing. Active speakers, for example, include built-in amplifiers and often signal processing like crossovers or EQ. This contrasts with passive systems, which rely on external components. The term applies broadly in audio gear, from loudspeakers and crossovers to DI boxes and filters. Active systems simplify setup and tuning but often trade off flexibility and repairability.