Yes, and my soundcard SBZ has pretty high out impedance as well. Think I will return the tube amp and possible spend the money on a soundcard better suited instead. Thank you for your feedback it's been very helpful.

Thank you very much for your input and knowledge. The Fidelio X2 returned to sale today on amazon for 125£ so I went ahead and bought them. Now is there gain to be made from using the Fidelio X2 with a tube amp? Regards

HI Like many I have been lurking around a lot and done some research but I need help with the last piece. I am looking for a pair of headphones to be used with my desktop computer, mainly listening to music and movies. The headphone should offer great soundstage and the feel as if I am in the...