Westone B50 Earphones with Bluetooth Westone B50 with five balanced-armature drivers is making a rumble in the earphone world with their largest low-end driver in combination with dual mid, and dual high-frequency drivers. The result is a powerful sound that is sure to satisfy bass hungry listeners. Westone B50 creates a sound that is totally immersive, with sonic detail and clarity that has to be heard to be believed Expertly tuned and carefully configured balanced armature drivers are dedicated to high, mid and low frequencies respectively. Also, Westone have added the largest low-end BA driver, combined with a sophisticated crossover for a sound experience that extends well beyond typical in-ear monitors for a sound you can feel as well as hear. With the full-resolution Bluetooth Cable, the B50 is able to convey extraordinary detail, clarity and a highly dynamic soundstage wirelessly. Westone have also included its high-definition silver cable with low resistance copper wire to improve conductivity and provide a more clear and detailed sound. True-Fit® Technology With 60 years of experience in designing and making in-ear audio products, Westone are experts in creating low-profile, lightweight, universal-fit monitor earphones that provide the highest comfort and perfect in-ear coupling for the best possible listening experience. Advanced Balanced Armatures Custom designed and expertly tuned balanced armature drivers with smaller dimensions than standard dynamic models provide enhanced sonic detail and a broad frequency range. High-Definition Cable Westone’s High-Definition Silver MMCX Cable features four strands of low-resistance, pure-silver plated copper alloy, braided around a centre strengthening core. Low resistance silver-plated copper wire improves electrical conductivity, providing extraordinary clarity and detailed sound reproduction. Bluetooth Cable Full-resolution Bluetooth Cable uses aptX® technology to deliver extraordinary detail, clarity, and a dynamic soundstage that has to be heard to be appreciated. The Westone Bluetooth Cable features; 8 hours of battery life, a 10 meter/ 32 foot range, has a water and dust resistant IPX-4 rating and features our exclusive MMCX Audio® connectors, which allows the Bluetooth Cable to be used with any custom-fit or universal-fit earpiece Technical Specifications The Westone B50 features a full-range five balanced-armature driver, with three-way crossover (single low, single mid, dual high-frequency drivers), with 118 dB SPL @ 1mW sensitivity, 10Hz - 20kHz frequency response, and an impedance of 25 ohms @ 1kHz and 25dB passive noise attenuation