The baritone range is classically A2 to A4 — about two octaves spanning from the A in the second space of the bass clef staff up to the A above middle C. The signature: a rich middle range with a comfortable speaking-voice quality, plus the ability to dip below middle C without thinning out and reach into the upper octave without forcing.
The reason baritones are mistaken for "failed tenors" is the upper passaggio. For a baritone, the register transition sits around E4-G4. Above that, going into full voice requires significant mix-voice technique that most untrained singers haven't developed — so they crack, flip, or strain. A trained baritone can sing comfortably to A4 in full voice and into B4-C5 in mix or head voice.
Most male pop singers are baritones with extended top extensions trained into the voice: Bruno Mars (often classified tenor but baritone-tessitura), Justin Timberlake, John Mayer, Hozier, Sam Smith's lower work. They sound "high" because they've trained mix voice rigorously, not because they're anatomically tenors.
