ES Lab ES-2a Open-Back Electrostatic Headphone
The ES Lab ES-2a is a premium open-back electrostatic headphone designed and assembled in Hong Kong by a team known for electrostatic headphone restoration. It pairs a large electrostatic driver with a rigid alloy housing to deliver a detailed, transparent presentation for discerning listeners.
Type and Technology
Open-back electrostatic transducer using a 90mm ultra-thin Mylar diaphragm driven by a pair of thin OFC electrodes, for very fast transient response. It uses STAX Pro bias (DC 580 V) and terminates in a five-pin STAX Pro-type plug, so it requires a compatible electrostatic energizer or amplifier and cannot be driven from a conventional headphone output.
Sound Character
A detailed, transparent, and highly resolving sound with the speed and low distortion characteristic of electrostatics. Optional tuning filters allow the midrange and transient profile to be tailored to taste.
Build and Comfort
Rigid yet lightweight aluminum-magnesium alloy housing with detachable and swappable earpads. The headphone weighs 450 g without cable and ships with a 2.3 m cable. As an open-back design, it is intended for quiet listening environments rather than noisy spaces.
Best For
Owners of a STAX Pro bias (580 V) electrostatic energizer who want a resolving, customizable open-back electrostatic headphone for critical listening.
What's in the Box
- ES Lab ES-2a open-back electrostatic headphone
- Attached 2.3 m cable with five-pin STAX Pro-type plug
Specifications
| Specification | Value |
|---|---|
| Transducer type | Electrostatic |
| Design | Open-back |
| Driver | 90mm ultra-thin Mylar diaphragm, OFC electrodes |
| Frequency response | 10-41,000 Hz |
| Sensitivity | 99 dB / 100 V RMS |
| Bias voltage | DC 580 V (STAX Pro bias) |
| Connector | 5-pin STAX Pro-type |
| Housing | Aluminum-magnesium alloy |
| Cable length | 2.3 m |
| Weight (without cable) | 450 g |
| Amplification required | STAX-compatible electrostatic energizer (580 V bias) |
What Reviewers Say
This video review walks through the ES Lab ES-2a, discussing its tonality, comfort, and technical performance.
Returns & Support
We want you to love what you buy. If you're not satisfied, we accept returns within 30 days of delivery for items in original condition. Contact us before returning at info@mimic-audio.com.
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