A voice (φωνην μιαν). For μιαν as indefinite article see 8:13. Accusative case here after ηκουσα, though genitive in 8:13, a disti…

And the sixth angel sounded. See Barnes on Revelation 8:2-7 and following.

And I heard a voice from the four horns of the golde…

The sixth trum pet: The second woe. Here we find a description of disasters that reach to the death of a third of humankind (vv.15, 18; cf. 8:7). “…

And the sixth angel sounded
His trumpet:

The sixth angel sounded, and here the power of the Turks seems to be the subject. Their time is limited. They not only killed in war but also broug…