Refined Fostex proprietary Regular Phase (RP) diaphragm driver using copper foil etched polyimide film and powerful neodymium magnet Maximum input level of 3000mW to comply with various professional uses Open for deep bass sound

TRIPLE BALANCED-ARMATURE DRIVERS WITH THREEWAY CROSSOVER: The UM Pro 30 features three proprietary balanced-armature drivers with a 3-way passive crossover and is our most popular IEM. Designed for performing musicians, the UM Pro 30 has a soundstage that features powerful lows, articulate mid-range, and crystal-clear highs. The UM Pro 30 has the performance, power, and output for any stage and will meet the demands of the most discerning musician and music lover alike. THE MOST COMPACT, LOW PROFILE, ERGONOMIC DESIGN IN THE WORLD: Designed and built to perform in the most demanding environments, the compact, low-profile, ergonomic design of the UM Pro 30 is incredibly comfortable, and can be worn for hours and hours. Westone's silicone and comfort foam eartips enhance the performance of our IEMs by providing superior noise isolation and ensuring a superb fit. TWISTED MMCX AUDIO CABLE: Westone's professional-quality MMCX Audio Twisted Cable is manufactured using high-strength, high-flex, ultra-low resistance tensile wire, which is reinforced with a special aramid fiber. Twisted to help reduce cable noise and keep the cable light-weight, flexible, and comfortable, our cable features MMCX Audio Connectors and 3.5mm stereo plug. Built to withstand the rigors of the road, Westone's MMCX Audio Cable is perfect for use on-stage, or for personal listening