Precision Engineering from Two Legends TANCHJIM and EFFECT AUDIO have come together to co-develop FORCE, combining TANCHJIM’s mastery of acoustic engineering with EFFECT AUDIO’s cable craftsmanship. Every part of the FORCE, from its custom dual dynamic drivers to its signature silver-plated cable, was born from deep collaboration. This partnership ensures a perfect balance of sonic performance and design, offering listeners a refined yet powerful Hi-Fi experience. Premium Open-Back Design Unlike traditional IEMs, the FORCE uses an open-back rear chamber featuring a fine steel mesh that allows air and sound waves to flow naturally. This unique design minimizes internal reflections and ear pressure, creating a more expansive soundstage while significantly reducing listening fatigue. Despite being open-back, the FORCE still offers excellent passive noise isolation and minimal sound leakage thanks to precise engineering and acoustic damping. Flagship Dual Dynamic Driver Architecture FORCE houses two custom dynamic drivers: an 8.2mm beryllium-coated mid-high driver and a 10mm titanium-coated bass driver, both using PU-suspended diaphragms. This setup, based on TANCHJIM’s DMT 4 Ultra driver platform, provides powerful bass, detailed mids, and sparkling treble. The materials and suspension allow for fast transient response, natural tonality, and rich dynamics without distortion—even at high volumes. HPFD-Seg Frequency Division Technology To ensure each driver performs optimally, FORCE employs TANCHJIM’s proprietary HPFD-Seg crossover technology. This high-precision frequency segmentation keeps both drivers working within their ideal range, reducing harmonic distortion and phase issues often found in multi-driver setups. The result is a cohesive, high-resolution sound that preserves micro-detail and emotional nuance. Cable by EFFECT AUDIO The included cable is handcrafted by EFFECT AUDIO using four strands of silver-plated UP-OCC single-crystal copper in a custom coaxial weave. This high-performance cable delivers exceptional signal purity and electrical conductivity, enhancing bass authority and treble extension. EFFECT AUDIO’s UltraFlex™ jacket makes it soft, skin-friendly, and durable for all-day comfort. Built-In DSP and Custom EQ The DSP version of FORCE supports USB-C digital output and integrates seamlessly with TANCHJIM’s official tuning app. Users can fine-tune their sound using a 5-band parametric EQ or choose from curated presets including Harman 2013, 2016, and 2019 target curves. Community presets and game sound profiles are also available, giving users endless customization options. Ergonomics and Comfort Redefined The FORCE’s shell is crafted from medical-grade, high-transparency resin for a second-skin fit. The outer faceplate is CNC-machined aluminum with a fine sandblasted finish, creating a striking visual contrast. The internal weight distribution is carefully balanced to reduce pressure points, and with the included T-APB pressure-balanced eartips, the fit remains stable and fatigue-free even during long listening sessions.
