HD800s, Etymotic SR4, Sony MDR-M1ST, ATH m50x with Burson Soloist 3XP

This is my 2nd Soloist headamp. The first one is Soloist SL MKII which was ordered to drive HD650. Obviously there was some background noise when HD650 was driven by the brand new Soloist SL MKII at high gain and those background noise disappeared with time. For Soloist 3XP, I can’t hear any background noise […]
