HD650, the veil is gone!  

DIY project page:

http://www.head-fi.org/t/575950/diy-5ft-solid-silver-hd600-650-cables-veil-smashers#post_7823826

Just built 5ft solid silver interconnects and the veil is gone. More treble, more bass, better sound stage, better imaging, better everything. One thing I was noticing with the old cable and the uDac was that at low volumes the treble volume seemed to drop off faster, well, no more, volume control is even across the sound spectrum. The whole spectrum of sound is faster, lighter, more open, easier to listen to. 

Below is a parts list, the total price is around $75-$100. I'm sure you can go forgo the Silver Solder and save $24.

Silver Wire:

http://www.fdjtool.com/ProductInfo/I-SRWP22.aspx

1/16" Shrink Wrap:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=082-014

1/4" Shrink Wrap:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=082-034

Neutrik 1/4" Headphone Plug:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=092-320

Silver Solder:

http://www.parts-express.com/pe/showdetl.cfm?Partnumber=093-586

HD600/650 Cardas Plugs:

http://www.dedicatedaudio.com/inc/sdetail/16501

I got this "recipe" from another site on the web that showed how to build a DIY silver interconnect. I can say with confidence that you will be happy with how this sounds compared to the stock cable, it's really uncanny how much better it is.

If anyone is curious I can post pictures and some basic steps to building your own, it only took about 3 hours, most of that time was spent pushing wire through the heat shrink, kind of a tedious process.

Key Points:

Get "dead soft" 99.9% pure silver wire.

Carefully push it through the heat shrink, try not to kink it. 

On the Neutrik plug the center post is left, the outer post is right, and the sheath is ground.

On the HPSC cardas plugs, the small post is signal, and the large post is ground.

A hair dryer could work for the heat shrink, but you could also try holding the wire close to an electric stove top. 

At low volumes there was definitely a veil with the old cable. 

The veil is real for some people, the cause or solutions can be different I am sure. I listen at the lowest possible volume on the uDac 2, is it a problem with the uDac, could be. Not only is volume louder with the new cable, but volume control is more precise. Previously the treble volume would roll off as the volume was decreased, that effect is now gone.  

I never turn the uDac2 above 12 oclock, I usually listen around 9-10 oclock, so I listen near the very lowest point that sound actually comes out of the uDac and thus the veil can be heard for me personally. The cables have cleared that up and a LOT MORE...  

It's amazing how much more detail there is really, more air, more everything, I think most of the difficulty amping the HD650 may be in the cable, lol.