The room is firmly in control of bass response below the transition frequency where bass remains omni directional, gaining more forward bias as frequency increases. When the wavelength matches room dimensions (including 1/4 waves) it can become what we know as Room Modes and/or Standing Waves as the sound wave gains amplitude from the boundary interaction, or is out of phase at the listening position and needs amplitude increased. Peak or null, its a mode.
20 hz = 56.5 ft 100 hz = 11.3 ft
Options:
1 - run 'Room Correction' from all sorts of positions until you find a setting you can live with
2 - Buy more subs to balance bass response seat to seat
3 - Learn to manipulate DSP by adding filters to the corresponding frequencies as evidenced by your own 1/24 octave measurements with the appropriate amplitude and bandwidth (Q) to cancel out the resonances.