A great voice (μεγαλης φωνης). Not an angel as in Revelation 5,2Offenbarung 7,2Offenbarung 10,3Offenbarung 14,7Offenbarung 14,9Offenbarung 14,15Offenbarung 14,18Offenbarung 15,8

Pour out (εκχεετε). Second aorist active imperative of εκχεω (same form as present active imperative). Blass would change to εκχεατε (clearly aorist) as in verse Revelation 16:6

The seven bowls (τας επτα φιαλας). The article points to verse Revelation 16:7