Not DACs. These are devices that supposedly clean up the USB connection itself. The two tested are the AudioQuest JitterBug and the Uptone Regen.
Obviously, this is just one set of measurements, so they could be flawed in some way. But this is the first objective examination of the performance of USB "decrapifiers" that I've seen.
It's worth noting that AudioQuest also sells other snake-oil products, like $1000+ HDMI cables.
SSL got a reaction from The Pizza Thief in Audio Reference
