DLBC is the bass management plugin for Dirac suite of algorithms. Check out this app note for more details on the various versions of Dirac algorithms.
At this point of time, only Tide series supports DLBC. You can read more from the Tide16 product page.
For all other miniDSP audio processors that unfortunately do not support Dirac Live Bass Control (DLBC), note that minIDSP platforms are unique in the sense that you can easily handle multiple subs. In other words, it's possible to achieve very similar results (albeit with a bit of work) as per the following app notes:
https://www.minidsp.com/applications/audio-streaming/sub-integration-with-shd
https://www.minidsp.com/applications/subwoofer-tuning/dual-sub-with-mso
https://www.minidsp.com/applications/home-theater-tuning/ddrc-88a-multi-sub-optimizer
Feel free to contact us if you further questions.