1, American ev amplifier, a mid-to high-end brand, is widely used in high-end multimedia classrooms, training rooms, small conference rooms or other simple sound reinforcement occasions. The microphone can be directly connected to the frequency shift power amplifier, which can effectively suppress the howling of the microphone to the speaker and support the access of background music for sound reinforcement, so the requirements for sound quality are not high.

2.Betasray has better sound quality and belongs to a brand with good quality, reputation and evaluation. It belongs to a high-end brand and provides sound reinforcement for large theaters, theaters, large performance venues, stadiums, professional cinemas, entertainment venues, commercial music broadcasts, conference halls, schools, conference centers, water landscapes and other public places.