The HE60 is like new, it functions very well, sennheiser changed all in 2009, pads, transductors. It's in perfect condition
the HEV70 is defective, it is necessary to put more volume in the right ear-phone. We can do it with the transparent caster on the hev70.
But after 45min, the hev70 makes sizzle the right ear-phone.
power supply: 220v european plug
I sell a STAX adaptator.
Sennheiser can repair the amplifier but I do not know their...