The ES40 is engineered to deliver a very balanced, powerful, and articulate sound stage, and delivers a breathtaking and immersive sound that makes the most of any recorded and mastered music. The new dual, low-frequency drivers create thick, rich, and immersive low-frequency information that accentuates todays recorded music, and is tough enough to survive on the world’s loudest stages. This combination creates an unbelievable listening experience that is sophisticated enough for the most discerning critical listener, but tough enough to survive in the world’s most demanding live-performance venues.
- Westone Custom-Fit Technology
Fully custom earpieces are cast, sculpted, and polished by hand from actual impressions of your ears, resulting in the best fit and acoustic seal possible.
- Balanced Armature
Westone’s balanced armature driver is significantly more compact and efficient than a traditional dynamic driver. Westone monitors provide enhanced sonic detail and frequency range that extends well beyond typical in-ear solutions.
- Flex Canal
A body temperature-reactive, semisoft earpiece canal additive that stays firm at room temperature for ease of insertion and then softens at body temperature, allowing increased comfort and acoustic seal for incredible noise isolation.
- Cold Pour Acrylic
Earpiece housings are cold-poured in acrylic for a thicker, more resilient acoustic enclosure. Expect increased durability, a more controlled response, and a lustrous appearance from this Westone technology.
- Dual Bore
With Westone’s Dual Bore technology, high and low frequency sound components are channeled through separate passages in the sound port and sum within your ear canal instead of the earpiece. The result is audibly more natural and provides a more convincing transition between frequency ranges.
- EPIC Replaceable Cable
Westone’s robust EPIC cable is constructed of bifurcated, high-flex, ultra-low resistance tinsel wire, reinforced with a special aramid fiber, and braided for ultimate durability, acoustic transparency, and isolation from mechanical cable noise. The MMCX Audio™ connector makes this solution conveniently user replaceable.
- Handcrafted 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.
- Westone Custom-Fit Technology
- Technical Specifications
ES40 Custom-Fit In-Ear Monitors, MMCX Audio® Twisted Cable, Water-Proof, Watertight crush-resistant Pelican case, Cleaning Tool, Reusable Desiccant, Cleaning/Polishing Cloth, Oto-Ease Lubricant, User Manual, and 2-year warranty
Colour Customisable Warranty 2 years (local) Availability Available Product Type Earphone Style/Type Custom In-Ear (CIEM) Driver Configuration 4-Drivers (Balanced Armature) Frequency Response (Hz) 10 Hz - 20 kHz Impedance (Ω) 28 ohms @ 1kHz Sensitivity 112 dB SPL @ 1 mW Headphone Design Closed-Back Microphone None Cable Style Detachable (MMCX) Input Connectivity 3.5mm stereo Additional Tech Specs
- Passive Noise Attenuation: Up to 25dB
- Driver: Four balanced armature drivers with passive three-way crossover
- Cable: EPIC MMCX replaceable cable, 52”/128 cm (customisable)
- User Reviews
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