Here's JD and the Stamps quartet singing JD's emblematic bass song "I Got To Walk That Lonesome Road" on the September 4th, 1972 dinner show of Elvis.
In the "extreme low notes" video I marked the lowest note as a chest Bb0 because it sounded like a Bb0 (at 2:47). But after putting it in audacity, I saw that it was actually a G#0.
Not really sure if it is a chest note anymore, I think it's more of an accidental chest-fry one but it's still crazy to think that it's a whole octave below the other low notes like at 0:42.
Whole concert posted by Javi TCB : https://youtu.be/uG4Yl9p6Cp8?si=RhJw0P91Wce0aD7s