We have a strict policy at Sound Advice not to publish reviews until the products are available to demo in a shop or buy. We don't see the point of doing it any other way.
However sometimes something comes along that is exceptional and the rules need to be broken.
Enter the new Yamaha YH5000SE open back headphones, a statement by the company of things to come, developments in future products in other words. at £4799, clearly they are not for everyone.
There's not long to wait, Yamaha tell us they will be in the shops in May, meanwhile you can read Ed Selley's review here