Westone ES20 Custom In Ear Monitor

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Product Overview

Westone ES20

Custom made to provide a precise, comfortable fit, the dual- driver ES20 provides exceptional low frequency response, smooth mids, and articulate highs—a great balance of full sound and price with 25dB of ambient noise reduction. 

  • Provides a natural, spacious sound and clear left to right detail
  • Dual-driver design
  • Fully custom fit with a variety of customizable looks 

Ideal for: On-Stage Monitoring, Home or Studio Recording, Audiophiles

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 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.

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 a more convincing transition between frequency ranges and is audibly more natural.

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. 

Design Features: Single Crossover: Splits the audio signal into separate frequency bands that can be separately routed to each micro driver. Each driver is optimized for a particular frequency range delivering to you a balanced, dynamic sound. Dual-Driver Balanced Armature Technology: Uses 1 bass/mid and 1 high frequency driver1 for the most accurate reproduction in a custom in-ear monitor. 


  • Drivers: 2. Single Low, Single High
  • Crossover: 1 way
  • Isolation: 25 dB
  • Frequency Response: 20 Hz - 18 kHz
  • Impedance: 27 ohms @ 1 kHz
  • Sensitivity: 119 dB SPL @ 1 mW
  • Cable: EPIC replaceable cable 52” / 132 cm
  • Warranty: 2 years

Includes: Deluxe monitor case, cleaning tool, desiccant drying compound, cleaning cloth, Oto-Ease, user’s manual.

How to buy

1. Ear Impressions. We prefer to take your ear impressions as we work with Westone directly and know exactly what they want. If you cannot visit us please ask your audiologist to contact us to ensure they take the correct impression. As soon as we have your impressions we can proceed with your order. Ear impressions are free if taken by ourselves.

2. IEM Selection. Let us help you decide. With 25 years live sound experience (About Us) we will ensure you get the IEM you need. 

3. Colour and Design. You choose your colour, cable length, type of case and the name you want on it. 

4. Manufacture. We send your impressions to the lab. It normally takes 2-3 weeks to turnaround your Custom In Ear Monitor. As soon as we have them we will ask you to visit us to ensure the fit is perfect.

Feel free to contact us now with any queries.

Have a question?

Call: 01 905 5823

Mail: I have a question

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