This is what I would recommend and suggest for you.
Tekton. Just hooked up my lowest tier 2-10s (pair of em) and .. wow.
You can get 2/4/6- 10.. 2x10 is equivalent to 14”, but smaller, lighter faster. With integrated 300w amp.
On high level ins for right now waiting on some cables.
seriously have never heard metallica or Iron Maiden sound so good.. the bass kicks just pop.
(they also have larger ones too, but I would use those for home theater)
Rel and Rhythmik are great suggestions. Whatever you do I’d highly recommend getting a pair of subs. On the cheaper end you could get a pair of SVS SB1000 (non Pro) subs from their Outlet for only $900. They’re only about 13” square but will still get you down to an honest 20Hz (-3dB), and they offer a 45-day risk-free trial including shipping both ways so you can see if they work for you. Hope this helps, and best of luck.
Video: only single sub to add Jurassic Park Dinosaur Stomp.
Video and Music: two subs, hopefully located adjacent to the fl and fr.
Low Bass may start out room filling mono, no direction home, however the many overtones definitely have directional info, thus a Stereo pair of subs is desirable.
I'm no fan of ports, and of course self-powered sub(s) helps your main receiver/amp.
++1 @scm Dont know why Hsu doesn’t get more love on here. I own two- for AV room and my home recording rig. I’m integrating from the preamp and AV prepro. Since Hsu is self powered, less strain on the mains. Seamless…
Why not a Sonus Faber Gravis ii? Same lineage as REL. Buy one now and a second later.
Rel and Rythmik are great suggestions. Rel from personal experience, Rythmik just from what I've reviewed. Personally, I own dual SVS SB1000 Pros that are fantastic, get low as mentioned earlier, and biggest benefit is you can control them (filters, volume, etc.) from your listening position via an app.No going back and forth and crawling around.