Hi drez.
I resoldered the cardas twopinconnector and now the cable is working perfectly.
One must have in mind that it is really two different things I am detecting and it isn't possible to adress it precisely (a completely new type of cable and balanced!). ...But I can give You the experience as it is... with the new balanced cable and a very important note is: Up to this moment I have only been using ny NFB-10ES through the USB-interface, qich has its ristriction. The NFB-10 will most likely sound better using Coax-in. I have been using blended quality music during a approx 350 h burn in and the impressions belov is based on high quality musicrecording in 24 bit/96kHz.
The HD650 doesn't sound bad at all even single ended and I could abolutely have lived with it...but after reading so many positive impressions at this forum it wasn't much to hesitate over.. Just get the parts and build it... And that is also my advice to all if having or are getting the NFB-10. ..Well the main difference running it balanced is that You will get "more of everything". ..more space in general, more details and definition, more air around the instruments and the musicians. I think something good happens to the SNR when You run it balanced... The background is more silent(blacker) compared to single ended. The dynamic is also more direct and very present and the microdetails as sublime sounds from fingers touching the strings on a guitar, conductor turning a page in the partiture, the shirt making sound when a musician is stretching after something between parts of the music... You will get the aura of the very room where the music is recorded. You are there! You can point out where each and every instrument/musician are sitting. Even the height difference between the players are revealed.You can almost touch them. If the drummer is located on a small stage,reffering to the other musicians. Thing like that makes me happy and it opens up another level in the listening for me.
My best experiences with high fi/end musicreproduction are with analogue sources...and it propably still will be for a longer time.. The digital technique have evolved well over the years I think, as all new technologies need to, to be as good as the predecessor was/is. With that said I must say that Kingwa has done a great job with this NFB-10 dac/pre. In my case I choosed the ES-version and I was lucky enough to get it with the USB-input.
I will later on test it in my main rig with high end amps and electrostatic speakers.. but that is possible when I have expanded our livingspace in our new home so until then I will enjoy my NFB-10ES with my balanced HD650.
I hope this will give You a little clearer picture.. Thanks for reading.
/Jan