He measures at 2 meters from a sub, if memory serves me well today.
His write up for overall sound was pretty good though.
My patience during setup was rewarded with outrageously good sound
and more.
But that still doesn't equate this sub in hitting the 19Hz with enough level to be useful. 20Hz was 86dB spl. 105.7 at 25Hz, 113 at 32Hz, 109.5 at 40 Hz, 109.7 at 50 Hz, 108 at 62Hz. So, it is pretty good from 25-63, and that is what is being heard mostly. That sounded very good.