qdc [VGP2025 Summer Gold Award] Frontier Emerald [Single Full Range, Wired Monitor Earphones with Customized BA Driver] Rear Cavity Micro Hole Technology, IEM 2-pin Connector, 0.1 inch (3.5 mm

Head to the new edge: A single full range IEM: The FRONTIER is a concept model that opens up the road to new cutting edge of the brand's new cutting edge as a product that opens the road to new cutting edge with the desire to experience the monitor sound of the professional use BA driver IEM. Equipped with unique customized BA drivers in a single full range The rear of the BA driver is equipped with a micrometer sized hole and the unique acoustic structure "Rear Cavity Microhole" to create a cavity. By eliminating turbulent noise and increasing vibration displacement, BA drivers deliver fast sound starts and responses to high resolution, while improving sensitivity and enhancing low-frequency drive power that was weak points of the BA driver. Professional use high impedance to reduce peaks, distortion, and noise but also make volume control easier

Rear Cavity Micro Holes: The FRONTIER uses qdc's unique cavity structure, and the customized BA driver uses a small exhaust hole on the back. Its structure named "rear cavity micro hole", provides sensitivity and low frequency adjustment through the rear hole of the BA driver. A cavity is built from the back of the BA driver to the back of the shell, and micro-holes are also opened on the back of the shell. This provides high impedance and noise reduction with enhanced sensitivity and enhanced volume capabilities, while also providing a natural way to strengthen the low-pass lack of a single BA driver in addition to the high definition sound that a single BA driver has been a challenge

Professional Monitor Tuning and Comfortable Wearing: The sound of the FRONTIER has been adjusted based on professional monitor tuning that qdc is original for. We pursue tuning with consideration to match different songs. In order to achieve the best possible sound possible, the Qdc brand provides high sound isolation thanks to the knowledge and technology obtained from a number of custom IMM developments. The cable is made of highly conductive high purity oxygen-free copper (OFC) 4-core wire covered with black PVC coating and a 4-core cable for superior handling. The connector part is a flat type custom IEM 2-pin connector (0.78 mm) and the plug is L-shaped molded 3.5mm 3-pole unbalanced, and the included cable clip reduces touch noise

[New Faceplate Design Translucent Mirror Gradient] FRONTIER faceplate uses the new design "Translucent Mirror Gradation". Semi-transparent, mirror and gradation combine together to create a beautiful and stylish design. In addition, the shell uses a special coating that looks like the resin filling. The FRONTIER comes with 3 sizes (S/M/L) of single flange that uses recycled silicone to reduce the burden on your ears when worn, and the qdc universal IEM, which is the first type of foam earpieces to be used as a focus on sound insulation and difficult to fall off, such as live and monitoring. It also includes cable clips that secure the cable to your clothes to reduce touch noise, cleaning tools, and an original semi-hard carrying case that is robust and compact for easy carrying

Driver: BA type (customized BA single full range) Driver configuration: 1BA / 1 driver (one side) / Type: Sealed / Frequency response: 10-30,000 Hz / Sensitivity: 106 dB SPL/mW / Impedance: 52 ohms / External sound blocking: 26 dB / Cable: High purity oxygen-free copper 4 core cable (approx. 120 cm) / Connector: Custom IEM pin (flat/0 3.5 mm (.78 mm) Plug: 3.5 mm (3.5 mm) 3 poles (L shape mold) Accessories: qdcTips Soft-fit Silicone Earpieces (S/M/L), 3 Pairs of Foam Type Earpieces (S/M/L), Cable Clip, Cleaning Tool, Original Carrying Case; Country of Origin: China