The Levites, i.e. some of the Levites, to wit, the priests, which bare the ark, as it is expressed, Joshua 8:33, for the body of the Levites stood upon Mount Gerizim, Deuteronomy 27:12; but these stood in the valley between Gerizim and Ebal, looking towards the one or the other mountain as they pronounced either the blessings or the curses, as may be gathered from Joshua 8:33. With a loud voice; so as they might be heard by a great number of the people, by whom the rest were informed and directed by some signal when they should answer.
Related Commentaries of Deuteronomy 27:14
Deuteronomy 27:14
14 And the Levites shall speak, and say unto all the men of Israel with a loud voice,