Which brand of professional stereo is good?

Professional stage sound equipment includes: monitoring mixer, power amplifier mixer, portable mixer, power amplifier, dynamic microphone and condenser microphone; Wireless microphone, speaker, monitoring speaker, power amplifier speaker, ultra-low speaker, equalizer, reverberator; Effector, delay, compressor, limiter, sound distributor, noise gate, CD player, recording stand, DVD player, projector, tone changer, song player, earphone and many other devices. As far as the overall equipment is concerned, the speakers are JBL of the United States, Martin of Britain, NEXO of France, Budweiser of the United States and EV of the United States, the amplifiers are Crown and QSC of the United States, the mixers are Cosay of Allen, Belinda of Germany and Yamaha of Japan, and the microphones are Sennheiser of Germany, Shure of the United States, AKG of Italy and JTS of Taiwan Province Province. Peripheral equipment: Ole Audio; Now all the performers use Rambo RB, the sound quality is excellent and the price is easy to accept.