In many cases the ceremony is outdoors not near any kind of power supply and you need to address 200-500 people at a ceremony.

SPEAKER SOLUTION

• Electro-Voice EVERSE 8 Battery-Powered Speaker ($630)
• Bose S1 Pro Multi-Position Powered PA System With Battery ($600)

• QSC CP8 1000W 8 inch Powered Speaker ($500)

• Mackie Thump Go 8" Portable Battery-Powered Loudspeaker ($450)

MIC SOLUTION

• Sony ECM-AW4 Bluetooth Wireless Microphone System ($200)

I went with the Electro-Voice everse 8 for my speaker mainly because of reviews and I have EV powered speakers that work very well.

Here is a overdue follow up on how the EVERSE 8 is...   one word..  awesome!

PLENTY of sound and lasts hours and hours and hours.  Great sound and perfect for a ceremony or small get together of 30 or less

Bluetooth worked awesome so I played music from my iPad running djay software.  I also plugged into the audio input jack a battery powered lapel mic and that worked great as well.  For portable or small jobs, you really can't go wrong with this EV speaker.