As an upgraded version of K2 ZS10, the Pro features self-customized balanced armatures which include two 30095 drivers for highs, two 50060 drivers for mids. With this configuration, the sound is transient, dynamic, and bright in all respects. Tripowin Zonie is always regarded as the most popular budget upgrade cable for IEMs. But it's not long enough to fit for more complex setups where the audio source is positioned farther away.