Very interesting development especially seeing as Bryston will now join the rest of the modern SSP world and offer room EQ in one of their products. Quite the philosophy shift. James, why the about face on this stance? As has always been the case those customers not wanting EQ simply do not have to use it but even then Bryston refused to add the feature over the years.
As far as room EQ goes it's good to see you not going the run of the mill home theater receiver route by adding Audyssey, Dirac is a much better choice possibly only bettered with Trinnov's product.
I remain highly skeptical about "Most critically, the SP4 will be built on a 3U modular platform, enabling Bryston engineers to integrate advanced technologies and make upgrades available to consumers, extending the life of the product."
The only proven long term up-gradable platform over the years has been the Theta Casablanca and now most likely the Trinnov Altitude32 because it doesn't use the typical DSP chips but rather is based on a PC architecture.
The ideal partnership would have been with Trinnov like Harman recently did but I'll definitely be following this Bryston deal with interest.
Regarding HDMI 2.1, nothing has it yet so don't fault this product. It was just recently approved and manufacturers are now in the process of receiving all of the testing certifications so I suspect we won't see any true HDMI 2.1 hardware until at least 4th quarter 2018 and most likely widespread product introductions not until later in 2019.