audioman58 said,
"I owned their top dac ,and inside a rip-off for the money the case is cheap like a $300 Blu-ray player ,I almost cut my hand open ,from the sharp edges
this too means it rings like a 🔔 no damping inside whatsoever ,on a $5k + piece of equipment and inside was just hollow space ."
Yes there is some empty space, that is a design decision. Digital circuits need to be kept physically apart from analog circuits to minimize noise transfer. Also, the DAC uses an FPGA for the digital conversion, a lot happens in that chip that eliminates some of the external components.
I also would not call that case cheap like a $300 Blu-Ray player, it’s a fairly simple design but has features that minimize the ringing compared to a cheap Blu-ray case. The fancy cases we see on expensive components are a significant cost driver. The DAC could have cost $1k more (or higher) if there was an audiophile approved case. Unknown if an audiophile approved case was more functional or just bling but PS Audio made their decision, and it works.