Small footprint subwoofer

Two final thoughts re: the SB1000 Pro…

• I respectfully disagree you don’t need a sub that goes below 30Hz for music even in a smaller room. There’s actually a lot of info down there that unintuitively contributes greatly to significantly better imaging and a more expansive and ambient 3D soundstage among other things. There’s a reason the best/most expensive subwoofers (and speakers for that matter) for music go down to 20Hz and lower — if there was nothing meaningful down there they wouldn’t bother.
• You can try one completely risk free for 45 days and see/hear for yourself, so again I ask why not?

Thats all I got, and again best of luck in whatever direction you go.

I’d add the SVS SB1000 Pro to your list as it’s small but still has a 12” driver and goes down to an honest 20Hz (-3dB), and you can get two for less than the price of one of the REL or KEF subs mentioned — I’d definitely get two as it’s always significantly better than one, and you get a $50 discount for buying two. In addition it comes with a helpful app that makes integration much easier, and they offer a risk free, 45 day in-home trial including shipping both ways, so why not??? Read the reviews that are consistently very positive. And BTW, the only way these would overwhelm your room would be if they’re not properly set up (i.e. volume/crossover set too high), which again is made much easier with their excellent app. Just another option to consider, and best of luck.