Active module features: 1.Active modules is based on digital signal processing technology. 2. it has professional digital audio processing module with 2-channel input 4-channel output Built-in processin chip combined with embedded operating system, make the show more easier and more convenient. 3.Each input channel has parametric equalization, noise gate, etc audio processing module, t can feedback on various perform data of complex sound field environments accurately, o that more accurate correction and compensation, make the sound reinforcement system adapted to the acoustic characteristics of the built environment better. 4. Each output channel has parametric equalization, ALLPASS all-pass filter, High and low pass filters, compressor and Limiter, it can limit the output signal size, and can avoid to long-term overload of rear equipment, so that can protect the amplifiers and speakers better.