@atmasphere is correct on both his points. The lowest note on a standard 4-string bass (electric or upright acoustic)---the E string played "open"---produces a 41Hz tone. I recently had to correct Myles Astor in a recent review of his; he used that same 82Hz figure. Worse yet, he spoke of 82Hz as being "very low bass." 82Hz?! I mini-monitor with a 5" "woofer" will reproduce that frequency.
And the Ampeg SVT is the best sounding bass rig I've heard. I've worked with three or four bassists who had one, and it's a monster. 8 output tubes, 8 woofers! A real pain to haul around, though. Still, not as bad as an upright piano or Hammond B3 organ!