To see the voice (blepein tēn phōnēn). The voice put for the person speaking.
Having turned (epistrepsas). First aorist active participle of epistrephō, from which also epestrepsa, just before, for which verb see Act 15:36; Act 16:18.
Seven golden candlesticks (hepta luchnias chrusas). See Mat 5:15 for luchnia (lampstand). Symbols of the seven churches as explained in Rev 1:20. See Exo 25:35. for description of a seven-branched candlestick, but here the lampstands are separate.