I rent equipment. I think it is necessary to equip your speaker with an equalizer without a dedicated processor (at present, most equalizers are double 3 1 segments, that is, 3 1 small push-pull rods, which can raise and lower the high, middle and low voices in segments. According to the needs of the site, I think it is particularly necessary to do activities, and when the microphone is whistling, it can be adjusted at the whistling point, so that there is no whistling in the activity and feedback suppression is unnecessary! )

Effector is mainly used to call some effects such as reverberation effect in singing and sense of space in musical instrument performance. Of course, if the voice microphone is dry, some effects can be added. However, if there is only a wedding without a performance, it is completely unnecessary. There are also some mixers with simple effects, which can be purchased as appropriate.

The sequencer is even more unnecessary. The function is to connect the power supply of your equipment to the sequencer in turn-on and turn-off order, and the sequencer is connected to the main power supply. Turn the switch clockwise to supply power, and turn the switch counterclockwise to cut off power. Simple devices know the correct handover sequence, so this is unnecessary.

Microphone ~ mixer ~ equalizer ~ amplifier ~ speaker basically meets the wedding needs.

I hope I can help you.