I was reading a thread on another forum that was addressing how we can get decent bass without the bloat or nodal boom that most rooms have.
Of course there are DSP solutions, which are fine for an all digital system. As long as you don't have to digitize the entire signal and keep everything above 80-100Hz in a true analogue domain that might be a great solution for those who also like vinyl.
Bass traps help, but are broad spectrum solutions and don't address the full issue.
The best way that was suggested is to use multiple subwoofers. Nodal modes tend to get cancelled out when you have 2 or more.
Hmmm, food for thought.