FORCE Effect Audio Collaboration Flagship Wired Earphones 10mm+8.2mm 2DD Silver-Plated UP-OCC IEM with Open-Back Acoustic & Air-Vent Structure Design, Lightweight, Low Distortion - 3.5/4.4mm/Type-C

Hybrid Dual Dynamic Drivers with Composite DiaphragmsAdopting the DMT4 ULTRA dual dynamic driver. The PU suspension provides a flexible and elastic bass response while preventing harsh metallic coloration in the highs, resulting in a more natural and refined sound. The beryllium-coated dome offers high rigidity and low mass, enhancing high-frequency extension and detail. The titanium-coated dome effectively suppresses breakup vibration and reduces distortion during dynamic passages. ^^ High-Precision Segmented Frequency Crossover TechnologyWith HPFD-Seg (High-Precision Frequency Division) technology, FORCE precisely controls the operating range of its 8.2 mm and 10mm dynamic drivers within their optimal low-distortion performance windowclosely matching 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) is just 0.036 % THD at 1kHz. ^^ EFFECT AUDIO Co-Developed CableDeveloped by TANCHJIM and EFFECT AUDIO, this premium cable is based on NEOTECHs UP-OCC (Ultra-Pure Ohno Continuous Cast) single-crystal copper technology. It features four strands of 26AWG silver-plated monocrystalline copper conductors, meticulously hand-braided for superior consistency and performance. The internal structure is acoustically tuned to enhance high-frequency clarity while maintaining a solid, full-bodied low end with deep, powerful extension.

^^ Open-Back Acoustic DesignFORCE features 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 improved high-frequency extension. Despite its open-back architecture, FORCE maintains excellent passive noise isolation and prevents sound leakage, delivering an open yet controlled listening experience. ^^ Patented Air-Release Vent DesignFORCE features 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.

Bringing a more natural and balanced listening experience, with improved reproduction of ultra-low frequencies and enhanced long-term comfort.