The DAC-19 is a great sounding DAC I've owned for only about five months, and the inputs have unexpectedly been fabulous for experimenting with some different cables and inputs (USB vs. coax RCA vs. coax BNC) because for better or worse, I can hear differences in my system easily with the DAC-19.
Well, I've been feeding my DAC-19 via RCA coax with a Wireworld Starlight 7 coax RCA cable, and it's no slouch, but I felt like I just wasn't getting the upper frequency speed and transparency I've heard with other configurations in my system. Because someone here or at CA suggested silver BNC as superior to RCA (for at least the impedance matching of BNC over RCA), I found an Oyaide FTVS-510 5N silver coax BNC cable on eBay outta HK for $165 or so and it arrived today.
Chain is: Airport Express optical out via Analysis Plus optical cable to W4S Remedy (Uptone LPS-1 power), coax BNC out via Oyaide silver BNC cable to Audio GD DAC-19 coax BNC input.
Normally I burn things in before listening because I just don't like the early listen disappointment I've experienced in the past. And if I don't listen for a week, nobody (including myself) can accuse me of expectation bias or any other bias (except that humans are always biased, but I digress). Well, you know where this is going...
I gave it a spin to make sure the cable worked. WHOA! WOW. I guess the DAC-19 is just the kind of DAC that really shines with a good input, and as good as the Amanero is, BNC coax with silver may have USB beat (and I have a microRendu with the Sonore/Cardas adapter on USB, which should tell you something).
This is preliminary, but man if it's this good 100+ hours out, and if the bass and midrange hold up as well then this combo is a real winner (with iTunes, no less!).
Anyway, YMMV as usual. I just wanted to share the silver BNC love.