The brand of the mixer at the wedding doesn't need to be particularly good. A good mixer is expensive and there are too many low-end fakes! It is better to buy a serious domestic mixer honestly, your friend is right! The mixer with its own power amplifier is designed to save trouble. The power is not high and the sound quality is not good. Just take care of something!

If there is a wedding, there are no special requirements. There are enough mixers on the No.8 bus! If there is a band or something, buy 12! A pair of microphones, stereos, a 400-watt single 15-inch speaker and a 500-watt power amplifier are absolutely enough for sound reinforcement of 200 square meters, which is also the most basic equipment, that is to say, with these things, music and microphones can make sound! Take these and practice your hands first! Because you have just come into contact with professional speakers, you certainly don't understand the surrounding areas such as equalizer and voltage limiter.

If the above basic equipment is used frequently, it will take more than half a year to be proficient! Use it often!

The above is purely a personal opinion, for reference only, I hope it will help you!