Weak link

Your room is the most important component of your system. If it’s not treated, you will be fighting to get th best out of your other components.

You didn’t say what you didn’t like about the sound you are getting. If you don’t like the bass, room treatments will help. If your don’t like the soundstage/imaging, room treatments will help.

I would hold off on buying any subs until you treat your room. Your speakers are sized appropriately to your room size so you might not need subs. My new house has abut the same size room as yours, and when I bought new speakers sized for my room, I pulled 1/2 of my room treatments out of my room that were used because the other speakers were too big for the room. I have subs but I don’t need them with the new speakers. I still use corner tube traps and 1st reflection panels.

Deep333- I’ve used subs on and off for 30 years. Used rel subs on and off for over 20+ years. The most benefit I got is in a small room (12 x 11) and in very large rooms (27 x 16’).

And of course HT in a theater room. The best systems I’ve had didn’t use subs and the best audio setups that I have heard didn’t use subs either.

I agree that you can use subs to treat certain areas but I’d rather use a speaker that fits the room that gives me the bass quality hat I’m after without subs. I have subs just sitting there not doing anything and I’m fine with that