With four balanced armature drivers and an advanced three-way crossover network, Westone W40 earphones produce stunning sound that is clear, rich, and nuanced. Westone went with smaller, more powerful drivers to produce these earphones; with all four drivers in each ear piping out the perfect frequency range of sound, the result is a finely-wrought delivery of your music that is full, exacting, and detailed. Like the rest of the Westone W Series, the W40 offers Westone's True-Fit technology, providing a semi-tailored universal (one-size-fits-all) fit via a combination of fit tips and a sturdy braided Epic cable designed to let you wear the cable over-the-ear. This keeps the cable out of your way while also helping your earphones stay in place. The W Series earphones are designed for personal listening. While the popular Westone UM Series is certain to please any audiophile, the UM Series is really designed as an in-ear musician monitor, while the W Series was created with serious music fans in mind. However, as a quad-driver earphone, the W40 would also be suitable for use as an in-ear monitor. With 25dB of passive noise blocking, the W series will allow you to focus on your music, picking up fine details amidst noisy surroundings -- even with your music set to a lower, safer volume. The W40 comes with 3 interchangeable faceplates: blue, red, and black. Westone W40 Earphone Technical Specifications: SENSITIVITY: 118 dB SPL @ 1 mW FREQUENCY RESPONSE: 10 Hz - 18 kHz IMPEDANCE: 31 ohms @ 1 kHz PASSIVE NOISE ATTENUATION: 25 dB DRIVER: 4 balanced armature drivers with a 3-way crossover. WEIGHT: 0.445 ounces/12.7grams CABLE: EPIC Replaceable cable and MFI G2 cable CABLE LENGTH: 50" / 128 cm Includes a new Westone Monitor Vault with high-impact construction, weather resistant exterior, and protective foam interior, so you can keep your high-end Westone earphones safe wherever you go. How to Fit Isolation Earphones/EarbudsYou May Also Like