Types of Audio Processors

crossover feeding three power amplifiers is called a triamplified
system. If clipping occurs in the low frequency
amplifier, the higher frequency harmonics created by the
clipping are reproduced only by a woofer that has very low
output at high frequencies, thus reducing the
audibility of the distortion. The use of active components
also offers smaller size and more repeatable production
due to better tolerances.
Quite often, a sound system combines elements of
both passive and active crossover networks. These types
of systems typically use an active crossover to provide a
separate subwoofer output for low frequencies, while a
passive crossover in a two-way loudspeaker divides
mid- and high frequencies. This could be described as a
three-way, bi-amplified sound system.
Most active crossovers allow for control of crossover
frequency and level at each output. DSP-based crossovers
typically offer greater adjustment, providing the user with
selectable filter slope, filter type, and polarity reversal.