The Chorus 706 shows itself particularly well on female vocals. Jewel's voice is meticulously delineated, and there is a refreshing cleanliness and clarity to the sound. And there is the kind of spot-on tonal balance that you usually find with more expensive speakers. The highs are pristine and simply soar. This isn't to say that you can only play female singers on these speakers.
Male vocalists do very well too for the same reasons.
On some speakers, the voice can sound overly resonant and chesty. The 706es again show the outstanding clarity and definition that they show with female vocals and nary a bit of bloat or overhang. This cut is a myriad of acoustic instruments that test a system's resolution, dynamics, and overall transparency. The 706es' clean and clear performance garners high marks here and stands out against competitors'. However, where the speakers do fall back somewhat is in the projection of soundstage depth.