Which voice has a second passagio of Eb4-Ab4?

The second passagio typically refers to the range within which a singer's voice transitions between vocal registers, often marked by a change in timbre or quality. In the context of this question, the specification of Eb4-Ab4 as the second passagio indicates a range that is characteristic of a baritone voice.

Baritones generally have a richer and fuller sound in their lower and middle registers, which makes them uniquely suited to navigate through the transition occurring in this range. The Eb4-Ab4 notes fall within the typical passagio range for baritones, making it a vital point of development as they move between their chest voice and head voice.

Mezzo sopranos, sopranos, and basses have different ranges and transition points that do not align with the Eb4-Ab4 range. Mezzo sopranos, for example, would typically have a higher second passagio more suited to their vocal characteristics, while basses have a lower passagio, and sopranos operate above this specified range. Hence, indicating that the second passagio of Eb4-Ab4 belongs specifically to baritones confirms their established vocal characteristics and range.