Coming from Tascam US-144 to Audio GD .. Here is the story.   A few years ago I discovered the magic world of listening to headphones. The reason for that is the ease of computer hifi.   I started with a Sennheiser HD650 and a Tascam US144 and was a happy man. After a year I decided to buy a Denon D7000 and a Violectric V200. What a wunderful combo I like to review the new Audio GD Master 9 headphone/preamp, but here is the other stuff first. Computer with Windows 7. Foobar 2000 wasapi event style. I use the following VST. For testing...