The most common term for a male singer with a very low voice, particularly one with a rich, deep tone, is a
Bass or Basso Profundo.
Here are specific terms and slang related to low-voice male singers based on style and range:
Basso Profundo / Profundo: The lowest singing voice type, often described as having a dark, powerful, and resonant timbre.
Oktavist / Octavist: A specialized, extremely low Russian basso profundo who can sing one octave below the normal bass range.
Crooner: Primarily used to describe male singers with a smooth, intimate, and often low-register, warm vocal tone (e.g., Bing Crosby, Frank Sinatra).
Bass-Baritone: A singer who bridges the gap between the baritone and bass ranges.
Gravelly Voice: Used to describe a low, raspy, or hoarse singing style often found in blues, jazz, or rock (e.g., Tom Waits, Louis Armstrong).
Vocal Fry: A technique or effect where the singer produces a very low, creaky, or rattling sound, often used in low-pitched singing.
Common Examples of Low-Voiced Singers:
B
arry White: Famed for his deep, bass-baritone to bass range.
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Tim Foust: A contemporary bass singer.
Avi Kaplan: Known for his deep, resonant bass tone.
Johnny Cash: Known for his deep, baritone-bass register.
Basso profondo - Wikipedia
Basso profondo. ... Basso profondo (Italian: [ˈbasso proˈfondo], "deep bass") is the lowest bass voice type. While The New Grove D...
Wikipedia
Bass Vocal Range - 30