Comet boasts a full-range driver coupled with a stainless steel housing and a 3D-printed Tuned Acoustic Expansion Chamber™ (TAEC). Its design caters to mainstream preferences with a slight emphasis on low frequencies. However, when used with a Digital Audio Player (DAP), the low frequencies may become overpowering and lose control. When paired with the "Limited", the bass is better controlled, leading to a noticeable improvement in dynamics and smoother vocals.

Billie Jean features a dual-driver configuration (1 high-frequency + 1 mid-low frequency) with JH's unique Freqphase technology and a 3D-printed metal infrared shell. Its sound leans towards a more stimulating profile with an emphasis on high frequencies. When paired with the "Limited", the harshness in the mid-high frequencies is reduced, and the three frequency ranges feel more full-bodied, improving overall analytical capabilities.


Nine 1 utilizes a 9.3mm dynamic and 1 balanced armature driver, with a 3D-printed shell. It is a simplified version of the previous A7 model, featuring a slight emphasis on low frequencies and slightly less extension in the mid-high frequencies, making it an entry-level option for the general public. When paired with the "Limited", there is improved control over the low frequencies and better extension in the mid-high frequencies.


The "Limited" of PW Audio primarily enhances the quality of mid-low frequencies and slightly increases the high frequencies, resulting in smoother vocals. When used with dynamic driver IEM, the improvement in mid-low frequency quality and analytical capabilities becomes more apparent, similar to the flagship 1960s.

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