It lets everyone hears but the sound is not that loud, e.g. manageable even in a room with bad sound insulation. Beside, a comparable speaker setup in term of s

It lets everyone hears but the sound is not that loud, e.g. manageable even in a room with bad sound insulation. Beside, a comparable speaker setup in term of sound quality takes a lot of space and cost a lot more which may not be desirable.