Studio subwoofers are available from 6” and upwards, no different from home audio subs.Its less about their control. Its their size that prohibits using them in a living room. Have you seen the size of an 18" sub woofer? Few have room for something as big as this, let alone a sub woofer meant for a recording studio.
Because nobody talks about them, beyond Dali, Polk, Wharfedale and Marantz. Just glance over any response to a gear solicitation query.Why are studio subwoofers not popular for home stereo? In my opinion they should be fairly controlled?
And for a strange reason, the OPs don’t even acknowledge pro-audio gear responses.