These thing have shocked me a bit. They completely change the sound of the Furutech cable I am using. Very smooth mids and highs, whilst still retaining sufficient bite.
The effect is greater (or at least on a par) than a triode roll in the DAC. Madness. I've decided I really seriously like them, more to be ordered.
I might get the test mic out and cross compare the Cardas with Furutech I/C I have with these. Something is measurably going on here. Good experiment. Same Furutech cable, different connectors.