Given that they share a driver, you’d expect the Hi‑X65 to have very similar specifications to Austrian Audio’s existing models, and so it proves. The main difference is that the 65s are somewhat less sensitive, presumably reflecting the fact that sound from the rear of the drivers ...
https://headphonetestlab.co.uk/test-results-manufacturers-a-d-austrian-audio-hi-x65 What's really impressive is their rather clean impulse response and unbelievably clean CSD. I have never seen a waterfall decay plot (i.e. resonance plot) so uniform and non-resonating - almost like electr...
"The result is great bass imaging and superior low THD at low frequencies, a linear frequency response, and open, precise, high-resolution sound that simplifies error detection and makes mixing and mastering a pleasure," the company said. The Hi-X65 open-backs rock a wide frequency range of...