This quad-driver, armature driver design has a unique, round, warm sound and sharp articulations.


Product Description
The W40 earphone will take your listening experience to an entirely new level. Four balanced armature drivers (two low, one mid and one high) and a three-way crossover network deliver breathtaking clarity and realism. Recommended for personal audio and video devices.
Westone True-Fit Technology : 50+ years experience with in-ear applications has yielded a low-profile, lightweight, universal earpiece which delivers maximum comfort and in-ear coupling for dynamic transfer of sound.
Balanced Armature Driver : 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.
3-Button MFi Control System + Mic : Function control for Apple® products including volume +/–, tracking +/–, phone answer, and Siri activation.
Designed in the USA : Meticulously crafted by a staff of dedicated artisans based in Colorado Springs, CO.


Sensitivity : 118dB SPL @ 1mW
Frequency Response : 10 Hz - 18 kHz
Impedance : 31 ohms @ 1 kHz
Passive Noise Attenuation : 25dB
Driver : Four balanced armature drivers with three-way crossover
Cable : MFi and EPIC Replaceable


In the Box
Exchangeable black, blue and red color faceplates are included with secure attachment. Five sizes of patented STAR™ silicone ear tips and five sizes of premium True-Fit™ comfort foam ear tips, MFi three button cable, a Westone 3.5 mm braided replacement cable, mini-monitor vault, and cleaning tool.


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