1.all digital pre effect devices are used to meet the requirements of multi-channel expansion and hybrid reverberation.

2.the speaker design should have a sense of encirclement, so the small room uses the high pitched sound to ensure the diffusion angle and softness. The medium and large rooms with large space, the high pitch transmission of the paper basin is not far enough, and the clarion is used to ensure clarity.

3. medium and large room equipment is more, use power supply sequencer to protect equipment, simplify operation.

4. the low frequency selection is not the bigger the better, but the pursuit of full frequency balance.

5. Zhongda room uses the electronic equalizer and digital processor to expand the debugging scope of the equipment.