I own the Jolida Glass FX DAC III and I was curious about the 47K output impedance figure because my preamp lists 13K as the input impedance and the audio sounds OK. Well, I just called Jolida and they said that the actual output impedance is 600 ohm, i.e. less than even 1K, let alone 47K! So my input of 13K is 21.7 times the output, which is over twice more than the recommended 10 times figure.
I asked why 47K is on the website even now and all they could say is that it must be a typo.
I asked why 47K is on the website even now and all they could say is that it must be a typo.