An interesting evening last night taking 3 sets leads each made of TEAD interconnect cable terminated with Copper Eichmann , Silver Eichmann and last but certainly not least WBT AG Nextgen plugs, original type ( I see that they have recently introduced a replacement 'analogue' version) to try in a friends system. He was using some Leads from Van de Hull not sure of the model but RRP of about £120. Firstly we listened to Keb Mo through the existing leads and then via Eichmann Cu , Eichmann Ag and finally WBT Nextgen Ag. The E' cu sounded far more detailed but somehow detached from the music. The E' ag's had more finesse whilst keeping the increased detail and sounded more 'right' Then came the WBT's where everything just snapped into place and the sound stage suddenly became more 3 dimensional and dynamic. We repeated this with classical , Ella Fitzgerald and various others and the effect was the same. We then experimented with sources changing from CD to streaming and the same inprovement was right across the board. An expensive experiment for my friend who is now gagging to get his hands on some new leads. We had replaced the leads between his CD player / Squeezebox and his most recent purchase, a Rega DAC. In the past he has been very sceptical about improvements that a lead could make, but last night his opinion changed!!!