Hand-crafted in Colorado Springs for musicians by musicians, the Signature Series is the premier product for music playback and monitoring. Designed with  five balanced armature drivers and a three-way crossover, the UM Pro 50 is the pinnacle of design, comfort and fidelity.

Westone True-Fit Technology
50+ years experience with in-ear applications has yielded a lowprofile, lightweight, universal earpiece which delivers maximum comfort and in-ear coupling for dynamic transfer of sound.

Balanced Armature
Westone’s balanced armature drivers are significantly more compact and efficient than traditional dynamic drivers. By combining multiple balanced armature drivers with sophisticated crossover networks, Westone monitors provide enhanced sonic detail and frequency range that extends well beyond typical in-ear solutions.

EPIC Replaceable Cable 
Westone’s robust replaceable cable is constructed of bifurcated, high-flex, ultra-low resistance tensile wire, reinforced with a special aramid fiber, and braided for ultimate durability, acoustic transparency, and isolation from mechanical cable noise. The replaceable audiophile connector makes this solution conveniently user-removable and replaceable.

Designed & Assembled in the USA 
Meticulously built by a staff of dedicated artisans and lab techs, Westone’s USA products exhibit a level of craftsmanship that truly embodies America’s rich history of handmade artistry.

Sensitivity: 115 dB @ 1 mW
Frequency response: 20 Hz - 20 kHz
Impedance: 45 ohms @ 1 kHz
Passive Noise Attenuation: 25 dB 
Driver: 5 balanced armature drivers with passive 3-way crossover
Weight: 0.445 ounces / 12.7 grams 
Cable: EPIC replaceable cable
Cable Length: 50” / 128 cm