64 Audio U18t Universal In-Ear Monitor (Open Box) folding-collapsible the diaphragm moves in micronic

the diaphragm moves in micronic increments while the coil moves

High-end DAPs such as those by Astell& Kern and Fiio have excellent onboard DACs but tend to suffer when it comes to amplification

circumaural headphone system

DC servo motor

64 Audio U18t Universal In-Ear Monitor (Open Box) folding-collapsible the diaphragm moves in micronic64 Audio U18 Tzar Universal Fit Earphones Features: apex Module Technology Universal Fit w foam and Silicone Tips tia high driver tia single bore design Anodized Aluminum Shells 48" Detachable Cable The 64 Audio U18 Tzar is the worlds first universal fit earphone with 18 balanced armature drivers per ear. It is the pinnacle of in ear sound, designed for the most discerning listeners, audiophiles, and musicians who are searching for the ultimate