If the designation “archangel” applied, not to Jesus Christ, but to other angels, then the reference to “an archangel’s voice” would not be appropriate. In that case it would be describing a voice of lesser authority than that of the Son of God.
The WT should explain then, based on their reasoning , how does Jesus Christ will come down with the trumpet of God if he has a smaller range than God .
New American Standard Bible
For the Lord Himself will descend from heaven with a shout, with the voice of the archangel and with the trumpet of God, and the dead in Christ will rise first.