I've noticed that some have that box transformer cover and some do not, I was wondering what the significance of this is?

Hi, Firstly let me thank all the people who post here for revolutionising my headphone experience My current setup: computer -> micro DAC -> Aria -> Senn 600s (with 650 cable) I find this setup great for "normal" music but when I turn to my collection of metal I find it lacking in some...

http://www.roger-russell.com/wire/wire.htm I have not yet formed an opinion about cables (so I thought I would ask the people in the know) but could expensive wire be one of the biggest cons of the last 20 years? I ask this because I was going to buy some Cardas headphone replacement cable...