I have had no experience with the Sennheiser EH 150 Headphones, but I have been using now for many years with great enjoinment the Sennheiser SD 590. Sennheiser offers what they call High End Headphones - open, light weight dynamic headphones and the model SD 595 supercedes the SD 590. More expensive models are the HD 600 Avantgarde and the audiophile HD 650. The audiophile HD 650 is supposed to be the top model of the High End Headphones. All the mentioned headphones, are, of course, of the wired type. "Zeev Schor" <[log in to unmask]>