So I'd like to make a few comments that compare and contrast the the Audioquest Cobalt to the iFi Micro iDSD Black Label. Bare in mind that for this comparison I used the iSilencer, iGalvanic3.0, and iPurifier3 in the chain on BOTH. 1) The Cobalt comes darn close using the Thinksound ON2 headphones to the BL. 2) The Black Label is more musical sounding with better decay, soundstaging, and a little more authority/grunt in the low end. But differences are perhaps between 5-10% at most. 3) The Cobalt has perhaps just a smidgeon tighter bass though not the authority, depth, and extension of the BL. 4) The BL is perhaps smoother with vocals more recessed while the Cobalt has the vocals up front and center stage. 5) What is shocking is how close it comes for it's small form factor. I know the Cobalt is not fully broken in yet either. 6) The Cobalt does improve with USB decrapifiers and better USB cables. The iSilencer did make a noticable difference in the naturalness of the sound and is worth the extra $50. I know Audioquest built in some of the Jitterbug tech into the Cobalt but my ears tell me there are still gains to be had for as little as $50 so Cobalt will scale a bit for those wanting to use it in desktop applications also.