And in conjunction with an Italian DSP solution provider, Dirac, Radius comes up with a proprietary iOS application, Ne AUDIO, in order to further increase the fidelity of the IEM. According to the manufacturer, Ne AUDIO not only corrects the overall frequency response , but also helps damp any unwanted transient characteristic of the driver itself. Really?
CON: A sharp deep-null above 10 kHz, suggesting there is some sort of phase-cancellation involved between the drivers. Treble is slightly sibilant too.
ON SECOND THOUGHT #3: Surprisingly, the rear vent only affects the mid range. Blocking the frontal vents shall increase the amount of bass, while pumping up the peak at 5 kHz at the same time.
ON SECOND THOUGHT #5: The proprietary app, Radius Ne AUDIO, definitely changes the sound of the IEM, by bringing it closer to the diffuse field reference. Even some of the harshness are gone.
ON SECOND THOUGHT #6: To my surprise, the combination of Ne AUDIO(HP-TWF22 enabled), UE900 stock sleeves, and shallow insertion yield a great synergy effect to JI-280Z. With the help of Ne AUDIO's precise compensation and the reverse-horn effect derived from UE900 sleeves most of the harshness will effectively be removed. As a result, the overall tonality actually becomes very close to that of Dr. Sean Olive's hi-fidelity target, with the bandwidth now easily reaching 20 kHz.