Subjectively it may or may not be subtle - that depends on what your room issues are, how many subs you have and how they are distributed through the room!
Objectively here are the measurements the first using just Dirac Live EQ and the second using Dirac ART - both on my 5.2.4 setup (but the height speakers are not used for support - although they ARE supported)
Like I said, your room is different to mine, your results will be different to mine - but the above shows that with only the addition of Dirac ART, I have almost totally resolved room related peaks and troughs in the bass response - the end result is as close to a perfect bass response as anyone can expect to achieve in a domestic environment.... in fact it is more than that, it is absolutely exceptional for pretty much any environment short of a specialised anechoic chamber..... really astounding.
You can still see the room related resonance at around 140Hz but it is now well controlled, and the other resonances and nulls have been almost completely eliminated.... it really is a level of performance I did not believe to be achievable at home.... but I was wrong, ART does in fact achieve it.
P.S. I never compared DLBC to ART, as I use full range towers for my L / R / SL / SR - and with DLBC these would simply be crossed over and their bass capabilities left unused..... hence I jumped straight from DL-RC to DL-ART, and skipped the DLBC step. Reports from many others, are that DLBC cannot achieve the decay control that ART achieves.... but you would need input from those who have tried it, which isn't me!
