ThePCEnthusiast reviewed the Philips Fidelio X3 Open-Back Headphone
A quote from the article:
The Philips Fidelio X2 was one of the most popular open-back headphones in the market. Not only that it was enjoyed by music lovers, but gamers as well. The X2 series has been around for quite some time now and many were anticipating a successor. Late last year, Philips released the Fidelio X3 open-back headphone.Philips Fidelio X3 Open-Back Headphone Review