this is why Zanth is a Mod -- true diplomacy.
I have to agree with everything Zanth said. I would be extremeley upset if my purchase of an amp yielded no results. In fact, when I first purchased my Meta42, I heard little improvement. However, as the amp burned in, the differences became very noticable, and now, listening to the stock CDP headphone out is bascially unlistenable.
If you want to stick with your Sony V6, then sell your Corda. If you want a better sounding headphone experience, try getting better headphones to pair with your quality CDP and amp.
I have heard the Cordas (HA-1 and Prehead) and they DO in fact make a huge difference in the sonic quality of music. Each of my amps improve the sound coming from my source to my headphones, so from my experience, and from what I gather from this forum, unequivocally, headamps DO make a difference.
If you feel attacked by this community, I'm sorry. However, your post seems closeminded re: headamps, as debasing all headamps based on your one experience does fit the bill of "trolling."
Give other phones a shot, and enjoy the music