Color me impressed. Compared to the already excellent Ascend Sierra, Carbon Fiber Sierra seemed to turn up the detail level, gut-punching PRAT, and harmonic density a notch. I never thought Ascend Sierra was not great in these departments before, but the Carbon Fiber Sierra definitely had more of these qualities. Increased detail resolution is most apparent in female vocals and upper midrange, where another light appeared to be shining on this region, making it easier to hear and see. A byproduct of this was improved imaging and placement in the soundstage. Each performer occupied solid, precise space on the stage, with life and sparkle projecting forward.
The next thing that hits you is the more impactful, solid basslines, which had more pitch definition and punch. Ascend Sierra has fabulous bass richness and definition already, but it just became tighter, with more solidity in growl and attack. The midrange had plenty of richness and girth, which made the whole sound balanced by holding together the more forward detailing and forceful bass into a coherent, colorful whole. When reading how the Carbon Fiber Sierra was designed with digital components in mind, I expected a softer, warmer type of sound to smooth over digititis, but almost the opposite has happened for some reason. This means that those audiophiles with digital front end that may be a bit long in the tooth, overly "hot" or "digital" sounding, may not necessarily find the Digital HP cord to be all that forgiving despite all its virtues described above. Those who own great, smooth digital gear but hope to extract a bit more air, sparkle, resolution, and punch, the Digital HP is the cord for the job.