I hope makes significant audible improvement.It’s good to be skeptical. The biggest challenge is that Dirac still relies on a single omnidirectional microphone in contrast to Sony, Yamaha, and Trinnov. Certainly you can do a better job of “Active Room Treatment” if you also knew where the speakers were coming from as opposed to estimating from the FR response alone. This again, is one reason why Dirac Unison works better in car audio than it does in the home theater world.
Fundamentally different refers to the underlying technical approach. Think Class AB vs. H vs Class D. To your ears, the flagship options within each class will sound similar to your ears but Class D is fundamentally different in approach.
Most room correction devices correct the left speaker by manipulating the left channel. Dirac ART manipulates the left bass by utilizing every channel (that you allow it to use).
It sort of makes sense. If we say below 80 Hz is non directional and you get ambitious and say that less than 60 Hz is non directional, why don’t you take the LFE signal and if your speakers can handle it, send the below 60 Hz content to all of your other speakers since it will reduce the cumulative workload?
This in fact is how many good soundbars work. The sub 80 Hz content is reproduced by all channels, regardless of the source encoding. That’s how you get surprising bass out of a 2” or 3” driver…