After our review of the GS1000i headphones we were inundated with emails, asking if we could review Grado's most expensive headphones, the elusive Professional Series 1000 (PS1000). With a staggering retail price around £1,700 these are a serious purchase, for a very serious music lover.

Having an expensive set of headphones is pointless if the rest of the system build is incapable of delivering the quality of signal we need. This is where Graham Slee comes into the equation.