At just 7mm in diameter, the EP-Zero is so small you won’t notice them in your ears except for the enormous sonic signature. The high-fidelity, full-range sound you experience with the EP-Zero earphones is truly shocking. How can such a small in-ear monitor produce this level of high quality? We started with a low-distortion dynamic equilibrium driver that produces detailed, full-range sound, and housed it in a full metal casing (no cheap plastic here) for ideal sonic performance. An audiophile-quality TPE cable connects the earphone to the metal encased micro controller and the RBH laser-etched gold plated headphone jack. The durability of the EP-Zero is further ensured by using a thermo-adhered strain relief at each end of the earphone cable. The EP-Zero in-ear headphones simply have to be heard to be believed.