The W80 features eight proprietary drivers impeccably tuned with a passive 3-way crossover to create an unbelievably immersive listening experience. Masterfully engineered, the W80 makes no compromises delivering reference level audio by integrating full size dual bass drivers with dual mid and quad high drivers. The result is the most comfortable, ergonomically designed earphone on the market, delivering expansive harmonic content with tremendous accuracy and an extensive soundstage. 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: Eight-driver system with dual bass, dual mid and quad high, linked with a 3-way crossover. Precise Acoustic Symmetry: Left and right earpiece responses are matched to an extraordinarily tight +/- 2dB tolerance extends well beyond typical in-ear solutions. ALO Audio Reference 8 Cable - Westone Edition: Eight braided silver-plated copper and OCC copper wires deliver intense musical resolution and fine inner detail. Industry-Leading Noise Isolation: Hear more of your music and less of the outside world with up to 35db of noise reduction.