I find it funny that some people actually have the perspective that a device that is over-engineered to overcome the inherent flaws in off the shelf chips could better a measurably, and audibly, very successful ground up design, from the WTA filter programmed in to the FPGA, to the discrete Pulse Array DAC, to the very unique, simple, and extremely transparent analogue output stage (headphone out and line out are essentially the same in DAVE - no other designer can do this with their DAC). No other designer is doing this level of innovation, with this kind of success. No other designer actually looks at the root problem and creates/invents their own solution. Taking a third party DAC chip and burying it's flaws behind over engineering is the exact opposite of transparency and quality IMO (not to mention value). Those Gryphon DACs are just using tired ES9018 chips. Let's see them actually invent some technology and DAC chips that measure close to the DAVE, then we can compare. I have no idea if the Gryphon DACs sound any good at the ear. All I'm pointing out is that over-engineering is not the same as innovating, and Rob's DACs have the measurements and reviews to back up his success.