For me the most important is not the bass lackings at 50 hertz it is the balance between bass and the other range ... I dont feel a sub is need at all ... Anyway it will be costlier and complex to set it really right in a balanced way ... I hate boominess ...
I listen great organ bass on my headphone anyway ... Most jazz and classical tuba included sound great on my 4 inches woofer with my redesigned porthole though ... Without the redesign porthole it is not balanced nor deep enough at 80 hertz ...
For me it ends when mechanical,electrical and acoustical embeddings are done right , nevermind the gear choices if synergy exist between them ...Price tag dont matter for me ...Acoustics rule ...
Now only music exist ...Sounds being is living walking materialized manifested temporary egregora with and through my system/room ...
@mahgister
Similarly, with my Joseph Audio Pulsars, the 5" woofers don’t produce the lowest bass but, depending on the source material, I don’t usually miss it. The Pulsars replace my Aerial Acoustics 10-T’s which actually tended toward too much bass in my 15.5’ x 23’ room so, overall, I’m happier with the Pulsars. I think with some modest room treatments I will finally be happy or.......wonder if I should add a subwoofer.
It never ends!