xEffect Audio Force 2DD Audiophile Single-Crystal Copper Wired IEM | EFFECT AUDIO Co-Developed Cable, Open-Back Cavity, Patented Air Release Vent, Lightweight, 3.5/4.4mm/Type C, Support APP

Hybrid Dual Dynamic Drivers with Composite Diaphragms: Utilizes the DMT4 ULTRA dual dynamic driver. The PU suspension delivers a flexible and elastic bass response while preventing harsh metallic coloration in the highs, achieving a more natural and refined sound. The beryllium-coated dome provides high rigidity and low mass, improving high-frequency extension and detail. The titanium-coated dome effectively suppresses breakup vibration and reduces distortion during dynamic passages. High-Precision Segmented Frequency Crossover Technology: Featuring HPFD-Seg (High-Precision Frequency Division) technology, this product accurately controls the operating range of its 8.2mm and 10mm dynamic drivers within their optimal low-distortion performance windowclosely aligning with the target amplitude-frequency response. During the crossover process, sensitivity loss is minimized to maintain high electro-acoustic conversion efficiency, with a total harmonic distortion (THD) of only 0.036% at 1kHz. Co-Developed Cable: Developed with EFFECT AUDIO, this premium cable is based on NEOTECHs UP-OCC (Ultra-Pure Ohno Continuous Cast) single-crystal copper technology. It contains four strands of 26AWG silver-plated monocrystalline copper conductors, meticulously hand-braided for superior consistency and performance. The internal structure is acoustically tuned to improve high-frequency clarity while maintaining a solid, full-bodied low end with deep, powerful extension. Open-Back Acoustic Design: This product incorporates a specially engineered open-back rear cavity, allowing reverse sound waves to interact freely with the surrounding air, effectively suppressing distortion. The result is a broader, more expansive soundstageboth horizontally and verticallywith enhanced high-frequency extension. Despite its open-back architecture, it retains excellent passive noise isolation and prevents sound leakage, offering an open yet controlled listening experience. Patented Air-Release Vent Design: This product includes a patented air-release vent system that equalizes air pressure between the inner ear canal and the external environment through a precisely vented pathway. This eliminates the common pressure-ear effect, reducing eardrum pressure and allowing the listener to perceive sound with lower F0 sensitivity. It provides a more natural and balanced listening experience, with improved reproduction of ultra-low frequencies and enhanced long-term comfort