Simple Explanation

A powered device that splits audio into different frequency bands and sends each band to its own amplifier—like one for the woofer and one for the tweeter.

Concise Technical Definition

A loudspeaker frequency divider requiring external power. It outputs split signals—typically two or more frequency bands—to separate amplifiers for each speaker driver. Most modern active crossovers use DSP (digital signal processing).

Layman-Friendly Analogy

Like a traffic controller that separates cars into different lanes—bass goes to one amp, treble to another—so each speaker driver only gets what it’s best at playing.

Industry Usage Summary

Used in pro audio, high-end home systems, and active monitors, active crossovers allow for precise control over crossover points, slopes, and EQ per driver band. They're essential in multi-amp systems where each driver (woofer, mid, tweeter) has its own dedicated amplifier.

Engineering Shortcut

Active crossover = powered filter → sends band-limited signals to multiple amps.

Full Technical Explanation

An active crossover is a powered audio processing device that separates an input signal into multiple frequency bands—typically for low (woofer), midrange, and high (tweeter) speakers—and routes them to dedicated power amplifiers. Unlike passive crossovers, which divide the signal after amplification, active crossovers operate at line level and offer greater flexibility in tuning crossover points, filter slopes, and gain settings. Most are implemented via DSP for precise digital control and are commonly found in professional sound systems, studio monitors, and advanced hi-fi systems.