Continued with the success of the HarmonicDyne Zeus flagship headphone, the Poseidon is developed and released based on the request of the audiophile community. It's a premium-grade headphone designed for the most discerning audiophiles. The Poseidon is among the first headphones to use an innovative pure nickel diaphragm. Compared with beryllium, pure nickel is four times in density and two times in tensile strength. A diaphragm driver made of purified nickel is much stiffer and more responsive, delivering a clearer sound with lower distortions. Combined with the open-back design, the Poseidon delivers a frequency response of 10 Hz to 40 kHz, allowing listeners to feel the incredible connection and transparency with the music.

What's more, a premium grade of solid maple wood is utilized to construct the housing cavity for the drivers. As a frequent choice of wood for making professional musical instruments, maple perfectly matches the new nickel diaphragm drivers because of its high responsiveness and acoustic projection. The solid maple housing allows emphasis of fundamental frequencies and quick decays, making for incredible note separation and clarity. On top of that, the sophisticated maple wood bespoke design casts a glamour over the headphone, making the Poseidon look as beautiful as it sounds.