Originally Posted by Raul GS
Just because units have RC does not mean they are well implemented or that they were properly used. In a blind study done by Harman, a number of RC systems did worse than no correction at all. Trinnov is an excellent product, and many of us purchased this AVR because of it. But then again, some of us also have far more expensive units with better RC (and Trinnov also sells a number of them).
The study is now quite dated, with most DRC systems generations beyond what was available then.
While the folks conducting the study at Harmon were aware of Trinnov, our system was not evaluated by Harman during the DRC study. This is perhaps because the R972 had not been released and because of the rarity at the time of Trinnov's high end systems. Also, Trinnov's approach to correction is very unique. Beyond, DRC, Spatial Image Correction (Remapping 2d/3d) is exclusive to Trinnov. One of the key elements that makes the Remapping effective is the ability of the Trinnov DRC to effectively match all the speakers to identical voicing in both time and amplitude.
Trinnov systems, owning to the PC/Linux architectural, can easily maintain an upgrade path as the art of DRC evolves. The R972 has Trinnov's Version 2 software, which benefited from approximately 10 earlier version updates. It represents the most sophisticated correction available for a single calibration point, as evidenced by the long computational time, as well as the results you all are confirming here.