Regarding Audyssey DEQ, I was a big fan of DEQ because I listen mostly at low volume, like between -25dB to -35dB. With Dirac I haven't missed DEQ not even a single millisecond. I watched yesterday the whole S2 of Shadow and Bone and it sounded FANTASTIC with Dirac. Bass was plenty strong and very well define. Dialogs are crips and sharp without causing ear fatigue. Also listened to music while biking indoors, and same feeling. AURO 3D sounds amazing with Dirac, much better than with Audyssey. BTW, I'm not trying to convince anyone that Dirac is better than Audyssey but in my case, it is. I have ZERO regrets about paying $350 for the Dirac License. In fact, I think it was worthy and I will do it again if I decide to change my living room X4700H with another X4800H.