Крупные апдэйты произошли от Beyerdynamic и AKG
http://prosound.ixbt.com/monitors/beyerdynamic-dt1990.shtml
http://prosound.ixbt.com/news/2017/april/05/akg-k275-k245-k175.shtml
http://prosound.ixbt.com/monitors/beyerdynamic-dt1990.shtml
http://prosound.ixbt.com/news/2017/april/05/akg-k275-k245-k175.shtml