What 64 Audio says:
64 Audio revolutionized the IEM industry in 2016 with its world class reference level U18t, the world’s first 18-driver earphone. Now, with the introduction of U18s, 64 Audio has taken the heritage of the 18 driver platform and further pushed the envelope of innovation in sound and design. U18s combines proprietary drivers, LID technology and a new electronic crossover network to deliver a uniquely exceptional listening experience.
U18s is handcrafted in the USA from aerospace-grade aluminum billet. CNC milled, sand blasted, fly cut, and twice anodized – the result is a striking fractal design that is inspired by nature itself.
Listening to U18s gives the sense that a filter has been lifted off of your music; it is suddenly more direct and vibrant. Resolution and presentation that reveals details which have previously gone unnoticed. The space between you and the performance is removed; the difference between hearing the best reproduction and experiencing it being played in real-time. The enveloping sound-stage and wide frequency response allows you to really press into the music without fear of harshness or fatigue.
Driver Type/Count Eighteen precision balanced armature drivers
Driver Configuration 1 tia high, 1 high-mid, 8 mid, 8 low
Frequency Response 10Hz – 20kHz
Sensitivity 106 dB/mW @ 1kHz @ 1mW (84mV)
Impedance 8Ω Nominal
Crossover Integrated 4-way passive crossover
-20dB w/ m20 module, -15dB w/ m15 module,
-10dB w/ mX module