I suspect that the podiums won’t be enough to obviate bass traps
Use some discarded tubes and pipes, seal them with plastic sheet, try different volumes or/and heights, put some straws with some different leghts and diameters, ( cut the straw in diagonals to be able to insert one part into one another for variable lenght and also very minute diameter experiment) listening experiments are needed to fine tune... It takes me a month for my 32 tubes...But the result is totally without audible flaws and i control ALL aspect of acoustics: imaging, soundstage, listener envelopment and trimbre perception...
It is the beginning of my " Helmholtz mechanical equalizer": cost nothing...Just fun to deal with the listening experiments.... Trust yourself....
My bass is clear, touch my chest and i own only 7 inches driver able tough to fill my room with a brass orchestra with a tuba... 13 feet by 13 feet 81/2 feet high...
No need for a sub , i own one and it is disconnected for ever.... 😊 And i like bass...
I dont listen cinema and plane coming down for sure....But the note of the tuba are all there....
My bass is marvellous....
Vibrations devices can clear the bass NEVER increase it in the room..... I know, i own my own springs devices system .... No cost also...
Science gives more money than it ask for..... 😊 The opposite of many tweaks....Replicate them or create them....