December 18, 2025 The Audio Tailor

STAX SRS-002 Compact In-Ear System Review: The Next Frontier in Electrostatic In-Ear Audio

Welcome to our STAX - SRS-002 - Compact In-Ear System Review, where The Audio Tailor dissects every nuance of this pioneering electrostatic in-ear monitor. Combining 15% lighter diaphragms than its predecessor, the S-001/MK2, the STAX SRS-002 redefines what miniature audio can achieve. If you’re hunting for ethereal resolution, unmatched transparency, and a dose of pure listening pleasure, this system pulls out all the stops.

STAX SRS-002 Compact In-Ear System

Design and Build Quality

STAX has long been revered for its attention to detail, and the SRS-002 carries this tradition into the world of in-ear monitors. The open-back, in-ear-canal enclosure houses a parallel 6-core cable and a 44pF capacitive element, producing 110dB sensitivity at 100V r.m.s. The earphones weigh a mere 11g without cable (28g with cable), ensuring fatigue-free listening even during extended sessions.

Electrostatic Sound: Beyond Dynamic Drivers

Unlike conventional dynamic and moving-coil designs, the STAX SRS-002 employs push-pull electrostatic circular sound elements that vibrate a paper-thin diaphragm with almost no mass. This translates to lightning-fast transient response, near-zero distortion (max 0.1% THD at 1kHz), and a level of micro-detail retrieval seldom heard in this class. The result is an articulate midrange, sparkling highs that extend to 20kHz with poise, and bass that surprises with its tautness and texture.

STAX SRS-002 Driver and Ear Pads

SRM-002 Amplifier: Power and Flexibility

The companion SRM-002 amplifier is as versatile as it is powerful. With a 550–580V DC bias voltage, 54dB gain, and a max output of 230V r.m.s., it effortlessly drives the SRS-002 from anything between a rechargeable AA battery and an alkaline dry cell. ECO and normal modes let you fine-tune tone quality while preserving up to 5 hours of battery life. This improved power supply design ensures consistent performance, whether on your desk or in the field.

Comfort and Fit

STAX includes three sizes of silicone ear pads (S, M, L) and an exclusive headband to achieve a stable, ergonomic seal. The new open-back design keeps heat and pressure at bay, while the lightweight diaphragms minimise in-canal fatigue. Pairing and micro‐adjustment are intuitive, making the SRS-002 ideal for both critical listening and immersive mobile use.

Who Should Consider the STAX SRS-002?

This compact system is tailor-made for discerning audiophiles and pro-audio professionals seeking a portable electrostatic setup. If you crave surgical clarity in your acoustic guitars, lifelike vocal reproduction, or the nuance of jazz and classical recordings, the STAX SRS-002 will reward you with exceptional depth and resolution. It’s equally suited to mixing engineers who need a reference-grade, on-the-go solution.

Pros and Cons

Pros: Unparalleled transparency and detail; incredibly fast transient response; lightweight and comfortable; flexible power options with SRM-002; low distortion and high dynamic range.
Cons: Requires dedicated amplifier (SRM-002); higher entry price point; bias voltage system may intimidate first-time users.

Elevate Your Listening Journey

Ready to experience the micro-detail and refinement of electrostatic in-ear performance? Dive deeper into the STAX SRS-002 Compact In-Ear System or speak with our team. Call 1300 308 711 or email sales@theaudiotailor.com.au for personalised advice and comparisons. Let us help you tailor your ultimate listening setup.