Audio Systems: selection of system, subjective matters, exhibition hall

Question
hi. i want to ask if i want to use public address music system for soft music and announcement in exhibition hall where no loudness require so you recommend the system at which is best and also explain how this system work.

Answer
Sorry, I do not make equipment and system recommendations.  Why?  Because there are too many subjective matters involved.  It is something you must research on your own against the budget, hall size, number of speakers needed, acoustic space and so forth.  

Best wishes.  Sorry.