ES Lab ES-2a Open-Back Electrostatic Headphone
ES Lab ES‑2a — Open‑Back Electrostatic Headphone
Product Overview
The ES Lab ES‑2a is a premium open-back electrostatic headphone designed and assembled in Hong Kong. Built by a team renowned for electrostatic headphone restoration, the ES‑2a delivers a detailed, transparent soundstage, high precision, and refined craftsmanship suitable for the most discerning audiophiles.
Key Features
- Electrostatic open-back transducer for ultra-fast transient response
- Aluminum-magnesium alloy housing — rigid yet lightweight
- 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 plug
- Detachable & swappable earpads
- Optional tuning filters for customized midrange and transient profile
- Made & tested in Hong Kong
Technical Specifications
Transducer Type | Electrostatic |
Design | Open-back |
Frequency Response | 10 – 41,000 Hz |
Sensitivity | 99 dB / 100 V RMS |
Bias Voltage | DC 580 V |
Connector | 5-pin Stax Pro-type |
Cable Length | 2.3 m |
Weight (without cable) | 450 g |
Shipping & Duty Info
- Lead Time: Estimated 9–13 working days (depending on location)
Important Notes
- Requires electrostatic headphone amplifier (Stax-compatible with 580 V bias)
- Open-back design — not suitable for noisy environments
- Swappable tuning filters and earpads allow user customization

ES Lab ES-2a Open-Back Electrostatic Headphone
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