Welcome to ASR (Audio Science Review). Although most of the regulars here embrace the subjective pleasures of listening to music and enjoying our audio systems, we will challenge any claims that run counter to known science.A proper system with educated ears can easily tell the difference between high-end DAC and cheap dac.
Anyone who has studied audio from the perspective of science knows that your claim is not true unless the following is included.
...but only when you know in advance what you are listening to, or one of the DACs in faulty in design or construction.
I am not aware of any instances of scientific, double blind testing that has verified your claim.
Therefore, the onus is on you to provide independently verifiable evidence to support your claim. That is how science works.