Welcome to our STAX - SRM-270s - Driver Unit Review

In this in-depth STAX - SRM-270s - Driver Unit Review, we explore how this compact powerhouse redefines electrostatic headphone amplification. As the beating heart of the SRS-X1000 system, the SRM-270S Driver Unit delivers razor-sharp detail, ultra-low noise and effortless dynamics. Discover why this unit has become a must-have for discerning audiophiles and how you can experience it firsthand: view the product page.

Design & Build Quality

The SRM-270S sports a sleek, compact chassis measuring just 132 × 38 × 153 mm and weighing a mere 540 g, making it ideal for desktop setups or a streamlined HiFi rack. Its 3 mm-thick front panel and robust aluminium extrusion case ensure effective heat dissipation, maintaining stable operation during marathon listening sessions. High-grade RCA pin jacks promise a pristine connection to your DAC or source component, while the matte finish exudes understated elegance.

Technical Performance & Sound Signature

• Frequency Response: DC to 35 000 Hz (+0, -3 dB) for reference-level extension—hear every nuance from sub-bass rumble to ethereal air.
• Harmonic Distortion: a whisper at 0.01% or less (1 kHz/100 V RMS), revealing micro-dynamics and tonal clarity.
• Amplification: 58 dB (800×) with a maximum output of 280 V RMS, driving electrostatic headphones with effortless authority.
• Low-Noise FET & Emitter Follower Output: Selected FET devices in the first stage and a refined emitter follower circuit deliver a noise floor so low you’ll rediscover the silence between notes.
• Flexible Installation: Parallel out terminals integrate seamlessly into existing systems—perfect for music, gaming or movie soundtracks.

Who Should Invest?

If you’re an electrostatic headphone devotee seeking unmatched clarity, dynamic range and headroom, the SRM-270S is for you. Desktop listeners who demand both performance and portability will appreciate its compact footprint and efficient power consumption (12 VDC/500 mA). Film buffs and gamers will relish the parallel out for seamless integration with surround processors or external amplifiers.

Pros & Cons

• Pros:
  • Reference-grade transparency with 0.01% distortion or less
  • Exceptional frequency extension (DC–35 kHz)
  • Robust heat dissipation for marathon listening
  • Compact and transportable chassis
  • Flexible parallel outputs for mixed-system setups
• Cons:
  • Single RCA input may require a preamp or switcher for multi-source systems
  • Specialised electrostatic design—only compatible with Stax-type headphones

Elevate Your Listening Experience Today

Ready to experience the pristine clarity and dynamic impact of the SRM-270S Driver Unit? Speak with our expert team at The Audio Tailor to discuss how it fits your system. Call us on 1300 308 711 or email sales@theaudiotailor.com.au for personalised advice. Whether you’re refining a dedicated desktop rig or integrating into a dedicated home theatre, our specialists—Gabby, Nathan, Vaughan and Isaac—are here to guide you.

Why The Audio Tailor?

We’re Australia’s highest-rated HiFi specialist, twice crowned Sound+Image’s HiFi Retailer of the Year. Our passion is matching exceptional gear—like the STAX SRM-270S—with your unique tastes and environment. Dive deeper at our online product page and let us tailor your ultimate listening journey.